case law research methodology

Legal Research Strategy

Preliminary analysis, organization, secondary sources, primary sources, updating research, identifying an end point, getting help, about this guide.

This guide will walk a beginning researcher though the legal research process step-by-step. These materials are created with the 1L Legal Research & Writing course in mind. However, these resources will also assist upper-level students engaged in any legal research project.

How to Strategize

Legal research must be comprehensive and precise.  One contrary source that you miss may invalidate other sources you plan to rely on.  Sticking to a strategy will save you time, ensure completeness, and improve your work product. 

Follow These Steps

Running Time: 3 minutes, 13 seconds.

Make sure that you don't miss any steps by using our:

• Legal Research Strategy Checklist

If you get stuck at any time during the process, check this out:

• Ten Tips for Moving Beyond the Brick Wall in the Legal Research Process, by Marsha L. Baum

Understanding the Legal Questions

A legal question often originates as a problem or story about a series of events. In law school, these stories are called fact patterns. In practice, facts may arise from a manager or an interview with a potential client. Start by doing the following:

• Read anything you have been given
• Analyze the facts and frame the legal issues
• Assess what you know and need to learn
• Note the jurisdiction and any primary law you have been given
• Generate potential search terms

Jurisdiction

Legal rules will vary depending on where geographically your legal question will be answered. You must determine the jurisdiction in which your claim will be heard. These resources can help you learn more about jurisdiction and how it is determined:

• Legal Treatises on Jurisdiction
• LII Wex Entry on Jurisdiction

This map indicates which states are in each federal appellate circuit:

Getting Started

Once you have begun your research, you will need to keep track of your work. Logging your research will help you to avoid missing sources and explain your research strategy. You will likely be asked to explain your research process when in practice. Researchers can keep paper logs, folders on Westlaw or Lexis, or online citation management platforms.

Organizational Methods

Tracking with paper or excel.

Many researchers create their own tracking charts.  Be sure to include:

• Search Date
• Topics/Keywords/Search Strategy
• Citation to Relevant Source Found
• Save Locations
• Follow Up Needed

Consider using the following research log as a starting place: 

• Sample Research Log

Tracking with Folders

Westlaw and Lexis offer options to create folders, then save and organize your materials there.

• Lexis Advance Folders
• Westlaw Edge Folders

Tracking with Citation Management Software

For long term projects, platforms such as Zotero, EndNote, Mendeley, or Refworks might be useful. These are good tools to keep your research well organized. Note, however, that none of these platforms substitute for doing your own proper Bluebook citations. Learn more about citation management software on our other research guides:

• Guide to Zotero for Harvard Law Students by Harvard Law School Library Research Services Last Updated Sep 12, 2023 300 views this year

Types of Sources

There are three different types of sources: Primary, Secondary, and Tertiary.  When doing legal research you will be using mostly primary and secondary sources.  We will explore these different types of sources in the sections below.

Secondary sources often explain legal principles more thoroughly than a single case or statute. Starting with them can help you save time.

Secondary sources are particularly useful for:

• Learning the basics of a particular area of law
• Understanding key terms of art in an area
• Identifying essential cases and statutes

Consider the following when deciding which type of secondary source is right for you:

• Scope/Breadth
• Depth of Treatment
• Currentness/Reliability

For a deep dive into secondary sources visit:

• Secondary Sources: ALRs, Encyclopedias, Law Reviews, Restatements, & Treatises by Catherine Biondo Last Updated Apr 12, 2024 4863 views this year

Legal Dictionaries & Encyclopedias

Legal dictionaries.

Legal dictionaries are similar to other dictionaries that you have likely used before.

• Black's Law Dictionary
• Ballentine's Law Dictionary

Legal Encyclopedias

Legal encyclopedias contain brief, broad summaries of legal topics, providing introductions and explaining terms of art. They also provide citations to primary law and relevant major law review articles.  

Here are the two major national encyclopedias:

• American Jurisprudence (AmJur) This resource is also available in Westlaw & Lexis .
• Corpus Juris Secundum (CJS)

Treatises are books on legal topics.  These books are a good place to begin your research.  They provide explanation, analysis, and citations to the most relevant primary sources. Treatises range from single subject overviews to deep treatments of broad subject areas.

It is important to check the date when the treatise was published. Many are either not updated, or are updated through the release of newer editions.

To find a relevant treatise explore:

• Legal Treatises by Subject by Catherine Biondo Last Updated Apr 12, 2024 3878 views this year

American Law Reports (ALR)

American Law Reports (ALR) contains in-depth articles on narrow topics of the law. ALR articles, are often called annotations. They provide background, analysis, and citations to relevant cases, statutes, articles, and other annotations. ALR annotations are invaluable tools to quickly find primary law on narrow legal questions.

This resource is available in both Westlaw and Lexis:

• American Law Reports on Westlaw (includes index)
• American Law Reports on Lexis

Law Reviews & Journals

Law reviews are scholarly publications, usually edited by law students in conjunction with faculty members. They contain both lengthy articles and shorter essays by professors and lawyers. They also contain comments, notes, or developments in the law written by law students. Articles often focus on new or emerging areas of law and may offer critical commentary. Some law reviews are dedicated to a particular topic while others are general. Occasionally, law reviews will include issues devoted to proceedings of panels and symposia.

Law review and journal articles are extremely narrow and deep with extensive references. 

To find law review articles visit:

• Law Journal Library on HeinOnline
• Law Reviews & Journals on LexisNexis
• Law Reviews & Journals on Westlaw

Restatements

Restatements are highly regarded distillations of common law, prepared by the American Law Institute (ALI). ALI is a prestigious organization comprised of judges, professors, and lawyers. They distill the "black letter law" from cases to indicate trends in common law. Resulting in a “restatement” of existing common law into a series of principles or rules. Occasionally, they make recommendations on what a rule of law should be.

Restatements are not primary law. However, they are considered persuasive authority by many courts.

Restatements are organized into chapters, titles, and sections.  Sections contain the following:

• a concisely stated rule of law,
• comments to clarify the rule,
• hypothetical examples,
• explanation of purpose, and
• exceptions to the rule  

To access restatements visit:

• American Law Institute Library on HeinOnline
• Restatements & Principles of the Law on LexisNexis
• Restatements & Principles of Law on Westlaw

Primary Authority

Primary authority is "authority that issues directly from a law-making body."   Authority , Black's Law Dictionary (11th ed. 2019).   Sources of primary authority include:

• Constitutions
• Statutes 

Regulations

Access to primary legal sources is available through:

• Bloomberg Law
• Free & Low Cost Alternatives

Statutes (also called legislation) are "laws enacted by legislative bodies", such as Congress and state legislatures.  Statute , Black's Law Dictionary (11th ed. 2019).

We typically start primary law research here. If there is a controlling statute, cases you look for later will interpret that law. There are two types of statutes, annotated and unannotated.

Annotated codes are a great place to start your research. They combine statutory language with citations to cases, regulations, secondary sources, and other relevant statutes. This can quickly connect you to the most relevant cases related to a particular law. Unannotated Codes provide only the text of the statute without editorial additions. Unannotated codes, however, are more often considered official and used for citation purposes.

For a deep dive on federal and state statutes, visit:

• Statutes: US and State Codes by Mindy Kent Last Updated Apr 12, 2024 3245 views this year
• 50 State Surveys

Want to learn more about the history or legislative intent of a law?  Learn how to get started here:

• Legislative History Get an introduction to legislative histories in less than 5 minutes.
• Federal Legislative History Research Guide

Regulations are rules made by executive departments and agencies. Not every legal question will require you to search regulations. However, many areas of law are affected by regulations. So make sure not to skip this step if they are relevant to your question.

To learn more about working with regulations, visit:

• Administrative Law Research by AJ Blechner Last Updated Apr 12, 2024 601 views this year

Case Basics

In many areas, finding relevant caselaw will comprise a significant part of your research. This Is particularly true in legal areas that rely heavily on common law principles.

Running Time: 3 minutes, 10 seconds.

Unpublished Cases

Up to  86% of federal case opinions are unpublished. You must determine whether your jurisdiction will consider these unpublished cases as persuasive authority. The Federal Rules of Appellate Procedure have an overarching rule, Rule 32.1  Each circuit also has local rules regarding citations to unpublished opinions. You must understand both the Federal Rule and the rule in your jurisdiction.

• Federal and Local Rules of Appellate Procedure 32.1 (Dec. 2021).
• Type of Opinion or Order Filed in Cases Terminated on the Merits, by Circuit (Sept. 2021).

Each state also has its own local rules which can often be accessed through:

• State Bar Associations
• State Courts Websites

First Circuit

• First Circuit Court Rule 32.1.0

Second Circuit

• Second Circuit Court Rule 32.1.1

Third Circuit

• Third Circuit Court Rule 5.7

Fourth Circuit

• Fourth Circuit Court Rule 32.1

Fifth Circuit

• Fifth Circuit Court Rule 47.5

Sixth Circuit

• Sixth Circuit Court Rule 32.1

Seventh Circuit

• Seventh Circuit Court Rule 32.1

Eighth Circuit

• Eighth Circuit Court Rule 32.1A

Ninth Circuit

• Ninth Circuit Court Rule 36-3

Tenth Circuit

• Tenth Circuit Court Rule 32.1

Eleventh Circuit

• Eleventh Circuit Court Rule 32.1

D.C. Circuit

• D.C. Circuit Court Rule 32.1

Federal Circuit

• Federal Circuit Court Rule 32.1

Finding Cases

Headnotes show the key legal points in a case. Legal databases use these headnotes to guide researchers to other cases on the same topic. They also use them to organize concepts explored in cases by subject. Publishers, like Westlaw and Lexis, create headnotes, so they are not consistent across databases.

Headnotes are organized by subject into an outline that allows you to search by subject. This outline is known as a "digest of cases." By browsing or searching the digest you can retrieve all headnotes covering a particular topic. This can help you identify particularly important cases on the relevant subject.

Running Time: 4 minutes, 43 seconds.

Each major legal database has its own digest:

• Topic Navigator (Lexis)
• Key Digest System (Westlaw)

Start by identifying a relevant topic in a digest.  Then you can limit those results to your jurisdiction for more relevant results.  Sometimes, you can keyword search within only the results on your topic in your jurisdiction.  This is a particularly powerful research method.

One Good Case Method

After following the steps above, you will have identified some relevant cases on your topic. You can use good cases you find to locate other cases addressing the same topic. These other cases often apply similar rules to a range of diverse fact patterns.

• in Lexis click "More Like This Headnote"
• in Westlaw click "Cases that Cite This Headnote"

to focus on the terms of art or key words in a particular headnote. You can use this feature to find more cases with similar language and concepts.  ​

Ways to Use Citators

A citator is "a catalogued list of cases, statutes, and other legal sources showing the subsequent history and current precedential value of those sources.  Citators allow researchers to verify the authority of a precedent and to find additional sources relating to a given subject." Citator , Black's Law Dictionary (11th ed. 2019).

Each major legal database has its own citator.  The two most popular are Keycite on Westlaw and Shepard's on Lexis.

• Keycite Information Page
• Shepard's Information Page

Making Sure Your Case is Still Good Law

This video answers common questions about citators:

For step-by-step instructions on how to use Keycite and Shepard's see the following:

• Shepard's Video Tutorial
• Shepard's Handout
• Shepard's Editorial Phrase Dictionary
• KeyCite Video Tutorial
• KeyCite Handout
• KeyCite Editorial Phrase Dictionary

Using Citators For

Citators serve three purposes: (1) case validation, (2) better understanding, and (3) additional research.

Case Validation

Is my case or statute good law?

• Parallel citations
• Prior and subsequent history
• Negative treatment suggesting you should no longer cite to holding.

Better Understanding

Has the law in this area changed?

• Later cases on the same point of law
• Positive treatment, explaining or expanding the law.
• Negative Treatment, narrowing or distinguishing the law.

Track Research

Who is citing and writing about my case or statute?

• Secondary sources that discuss your case or statute.
• Cases in other jurisdictions that discuss your case or statute.

Knowing When to Start Writing

For more guidance on when to stop your research see:

• Terminating Research, by Christina L. Kunz

Automated Services

Automated services can check your work and ensure that you are not missing important resources. You can learn more about several automated brief check services.  However, these services are not a replacement for conducting your own diligent research .

• Automated Brief Check Instructional Video

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• Last Updated: Sep 21, 2023 2:56 PM
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How to do legal research in 3 steps

Knowing where to start a difficult legal research project can be a challenge. But if you already understand the basics of legal research, the process can be significantly easier — not to mention quicker.

Solid research skills are crucial to crafting a winning argument. So, whether you are a law school student or a seasoned attorney with years of experience, knowing how to perform legal research is important — including where to start and the steps to follow.

What is legal research, and where do I start? 

Black's Law Dictionary defines legal research as “[t]he finding and assembling of authorities that bear on a question of law." But what does that actually mean? It means that legal research is the process you use to identify and find the laws — including statutes, regulations, and court opinions — that apply to the facts of your case.

In most instances, the purpose of legal research is to find support for a specific legal issue or decision. For example, attorneys must conduct legal research if they need court opinions — that is, case law — to back up a legal argument they are making in a motion or brief filed with the court.

Alternatively, lawyers may need legal research to provide clients with accurate legal guidance . In the case of law students, they often use legal research to complete memos and briefs for class. But these are just a few situations in which legal research is necessary.

Why is legal research hard?

Each step — from defining research questions to synthesizing findings — demands critical thinking and rigorous analysis.

1. Identifying the legal issue is not so straightforward. Legal research involves interpreting many legal precedents and theories to justify your questions. Finding the right issue takes time and patience.

2. There's too much to research. Attorneys now face a great deal of case law and statutory material. The sheer volume forces the researcher to be efficient by following a methodology based on a solid foundation of legal knowledge and principles.

3. The law is a fluid doctrine. It changes with time, and staying updated with the latest legal codes, precedents, and statutes means the most resourceful lawyer needs to assess the relevance and importance of new decisions.

Legal research can pose quite a challenge, but professionals can improve it at every stage of the process . 

Step 1: Key questions to ask yourself when starting legal research

Before you begin looking for laws and court opinions, you first need to define the scope of your legal research project. There are several key questions you can use to help do this.

What are the facts?

Always gather the essential facts so you know the “who, what, why, when, where, and how” of your case. Take the time to write everything down, especially since you will likely need to include a statement of facts in an eventual filing or brief anyway. Even if you don't think a fact may be relevant now, write it down because it may be relevant later. These facts will also be helpful when identifying your legal issue.

What is the actual legal issue?

You will never know what to research if you don't know what your legal issue is. Does your client need help collecting money from an insurance company following a car accident involving a negligent driver? How about a criminal case involving excluding evidence found during an alleged illegal stop?

No matter the legal research project, you must identify the relevant legal problem and the outcome or relief sought. This information will guide your research so you can stay focused and on topic.

What is the relevant jurisdiction?

Don't cast your net too wide regarding legal research; you should focus on the relevant jurisdiction. For example, does your case deal with federal or state law? If it is state law, which state? You may find a case in California state court that is precisely on point, but it won't be beneficial if your legal project involves New York law.

Where to start legal research: The library, online, or even AI?

In years past, future attorneys were trained in law school to perform research in the library. But now, you can find almost everything from the library — and more — online. While you can certainly still use the library if you want, you will probably be costing yourself valuable time if you do.

When it comes to online research, some people start with free legal research options , including search engines like Google or Bing. But to ensure your legal research is comprehensive, you will want to use an online research service designed specifically for the law, such as Westlaw . Not only do online solutions like Westlaw have all the legal sources you need, but they also include artificial intelligence research features that help make quick work of your research

Step 2: How to find relevant case law and other primary sources of law

Now that you have gathered the facts and know your legal issue, the next step is knowing what to look for. After all, you will need the law to support your legal argument, whether providing guidance to a client or writing an internal memo, brief, or some other legal document.

But what type of law do you need? The answer: primary sources of law. Some of the more important types of primary law include:

• Case law, which are court opinions or decisions issued by federal or state courts
• Statutes, including legislation passed by both the U.S. Congress and state lawmakers
• Regulations, including those issued by either federal or state agencies
• Constitutions, both federal and state

Searching for primary sources of law

So, if it's primary law you want, it makes sense to begin searching there first, right? Not so fast. While you will need primary sources of law to support your case, in many instances, it is much easier — and a more efficient use of your time — to begin your search with secondary sources such as practice guides, treatises, and legal articles.

Why? Because secondary sources provide a thorough overview of legal topics, meaning you don't have to start your research from scratch. After secondary sources, you can move on to primary sources of law.

For example, while no two legal research projects are the same, the order in which you will want to search different types of sources may look something like this:

• Secondary sources . If you are researching a new legal principle or an unfamiliar area of the law, the best place to start is secondary sources, including law journals, practice guides , legal encyclopedias, and treatises. They are a good jumping-off point for legal research since they've already done the work for you. As an added bonus, they can save you additional time since they often identify and cite important statutes and seminal cases.
• Case law . If you have already found some case law in secondary sources, great, you have something to work with. But if not, don't fret. You can still search for relevant case law in a variety of ways, including running a search in a case law research tool.

Once you find a helpful case, you can use it to find others. For example, in Westlaw, most cases contain headnotes that summarize each of the case's important legal issues. These headnotes are also assigned a Key Number based on the topic associated with that legal issue. So, once you find a good case, you can use the headnotes and Key Numbers within it to quickly find more relevant case law.

• Statutes and regulations . In many instances, secondary sources and case law list the statutes and regulations relevant to your legal issue. But if you haven't found anything yet, you can still search for statutes and regs online like you do with cases.

Once you know which statute or reg is pertinent to your case, pull up the annotated version on Westlaw. Why the annotated version? Because the annotations will include vital information, such as a list of important cases that cite your statute or reg. Sometimes, these cases are even organized by topic — just one more way to find the case law you need to support your legal argument.

Keep in mind, though, that legal research isn't always a linear process. You may start out going from source to source as outlined above and then find yourself needing to go back to secondary sources once you have a better grasp of the legal issue. In other instances, you may even find the answer you are looking for in a source not listed above, like a sample brief filed with the court by another attorney. Ultimately, you need to go where the information takes you.

Step 3: Make sure you are using ‘good’ law

One of the most important steps with every legal research project is to verify that you are using “good" law — meaning a court hasn't invalidated it or struck it down in some way. After all, it probably won't look good to a judge if you cite a case that has been overruled or use a statute deemed unconstitutional. It doesn't necessarily mean you can never cite these sources; you just need to take a closer look before you do.

The simplest way to find out if something is still good law is to use a legal tool known as a citator, which will show you subsequent cases that have cited your source as well as any negative history, including if it has been overruled, reversed, questioned, or merely differentiated.

For instance, if a case, statute, or regulation has any negative history — and therefore may no longer be good law — KeyCite, the citator on Westlaw, will warn you. Specifically, KeyCite will show a flag or icon at the top of the document, along with a little blurb about the negative history. This alert system allows you to quickly know if there may be anything you need to worry about.

Some examples of these flags and icons include:

• A red flag on a case warns you it is no longer good for at least one point of law, meaning it may have been overruled or reversed on appeal.
• A yellow flag on a case warns that it has some negative history but is not expressly overruled or reversed, meaning another court may have criticized it or pointed out the holding was limited to a specific fact pattern.
• A blue-striped flag on a case warns you that it has been appealed to the U.S. Supreme Court or the U.S. Court of Appeals.
• The KeyCite Overruling Risk icon on a case warns you that the case may be implicitly undermined because it relies on another case that has been overruled.

Another bonus of using a citator like KeyCite is that it also provides a list of other cases that merely cite your source — it can lead to additional sources you previously didn't know about.

Perseverance is vital when it comes to legal research

Given that legal research is a complex process, it will likely come as no surprise that this guide cannot provide everything you need to know.

There is a reason why there are entire law school courses and countless books focused solely on legal research methodology. In fact, many attorneys will spend their entire careers honing their research skills — and even then, they may not have perfected the process.

So, if you are just beginning, don't get discouraged if you find legal research difficult — almost everyone does at first. With enough time, patience, and dedication, you can master the art of legal research.

Thomson Reuters originally published this article on November 10, 2020.

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How to Conduct Legal Research

September 21, 2021

Conducting legal research can challenge even the most skilled law practitioners.

As laws evolve across jurisdictions, it can be a difficult to keep pace with every legal development. Equally daunting is the ability to track and glean insights into stakeholder strategies and legal responses. Without quick and easy access to the right tools, the legal research upon which case strategy hinges may face cost, personnel, and litigation outcome challenges.

Bloomberg Law’s artificial intelligence-driven tools drastically reduce the time to perform legal research. Whether you seek quick answers to legal research definitions, or general guidance on the legal research process, Bloomberg Law’s Core Litigation Skills Toolkit has you covered.

What is legal research?

Legal research is the process of uncovering and understanding all of the legal precedents, laws, regulations, and other legal authorities that apply in a case and inform an attorney’s course of action.

Legal research often involves case law research, which is the practice of identifying and interpreting the most relevant cases concerning the topic at issue. Legal research can also involve a deep dive into a judge’s past rulings or opposing counsel’s record of success.

Research is not a process that has a finite start and end, but remains ongoing throughout every phase of a legal matter. It is a cornerstone of a litigator’s skills.

[Learn how our integrated, time-saving litigation research tools allow litigators to streamline their work and get answers quickly.]

Where do I begin my legal research?

Beginning your legal research will look different for each assignment. At the outset, ensure that you understand your goal by asking questions and taking careful notes. Ask about background case information, logistical issues such as filing deadlines, the client/matter number, and billing instructions.

It’s also important to consider how your legal research will be used. Is the research to be used for a pending motion? If you are helping with a motion for summary judgment, for example, your goal is to find cases that are in the same procedural posture as yours and come out favorably for your side (i.e., if your client is the one filing the motion, try to find cases where a motion for summary judgment was granted, not denied). Keep in mind the burden of proof for different kinds of motions.

Finally, but no less important, assess the key facts of the case. Who are the relevant parties? Where is the jurisdiction? Who is the judge? Note all case details that come to mind.

What if I’m new to the practice area or specific legal issue?

While conducting legal research, it is easy to go down rabbit holes. Resist the urge to start by reviewing individual cases, which may prove irrelevant. Start instead with secondary sources, which often provide a prevailing statement of the law for a specific topic. These sources will save time and orient you to the area of the law and key issues.

Litigation Practical Guidance provides the essentials including step-by-step guidance, expert legal analysis, and a preview of next steps. Source citations are included in all Practical Guidance, and you can filter Points of Law, Smart Code®, and court opinions searches to get the jurisdiction-specific cases or statutes you need.

Searching across Points of Law will help to get your bearings on an issue before diving into reading the cases in full. Points of Law uses machine learning to identify key legal principles expressed in court opinions, which are easily searchable by keyword and jurisdiction. This tool helps you quickly find other cases that have expressed the same Point of Law, and directs you to related Points of Law that might be relevant to your research. It is automatically updated with the most recent opinions, saving you time and helping you quickly drill down to the relevant cases.

How do I respond to the opposing side’s brief?

Whether a brief is yours or that of the opposing party, Bloomberg Law’s Brief Analyzer is an essential component in the legal research process. It reduces the time spent analyzing a brief, identifying relevant authorities, and preparing a solid response.

To start, navigate to Brief Analyzer available from the Bloomberg Law homepage, within the Litigation Intelligence Center , or from Docket Key search results for briefs.

Simply upload the opposing side’s brief into the tool, and Brief Analyzer will generate a report of the cited authorities and arguments contained in the brief.

You can easily view a comparison with the brief and analysis side by side. It will also point you directly to relevant cases, Points of Law, and Practical Guidance to jump start your research.

[ How to Write a Legal Brief – Learn how to shorten the legal research cycle and give your legal brief a competitive advantage.]

How to optimize your search.

Crafting searches is a critical skill when it comes to legal research. Although many legal research platforms, including Bloomberg Law, offer natural language searching, terms and connectors (also called Boolean) searching is still a vital legal research skill and should be used when searching across court opinions, dockets, Points of Law, and other primary and secondary sources.

When you conduct a natural language search, the search engine applies algorithms to rank your results. Why a certain case is ranked as it is may not be obvious. This makes it harder to interpret whether the search is giving you everything you need. It is also harder to efficiently and effectively manipulate your search terms to zero in on the results you want. Using Boolean searching gives you better control over your search and greater confidence in your results.

The good news? Bloomberg Law does not charge by the search for court opinion searches. If your initial search was much too broad or much too narrow, you do not have to worry about immediately running a new and improved search.

Follow these tips when beginning a search to ensure that you do not miss relevant materials:

• Make sure you do not have typos in your search string.
• Search the appropriate source or section of the research platform. It is possible to search only within a practice area, jurisdiction, secondary resource, or other grouping of materials.
• Make sure you know which terms and connectors are utilized by the platform you are working on and what they mean – there is no uniform standard set of terms of connectors utilized by all platforms.
• Include in your search all possible terms the court might use, or alternate ways the court may address an issue. It is best to group the alternatives together within a parenthetical, connected by OR between each term.
• Consider including single and multiple character wildcards when relevant. Using a single character wildcard (an asterisk) and/or a multiple character wildcard (an exclamation point) helps you capture all word variations – even those you might not have envisioned.
• Try using a tool that helps you find additional relevant case law. When you find relevant authority, use BCITE on Bloomberg Law to find all other cases and/or sources that cite back to that case. When in BCITE, click on the Citing Documents tab, and search by keyword to narrow the results. Alternatively, you can use the court’s language or ruling to search Points of Law and find other cases that addressed the same issue or reached the same ruling.

[Bloomberg Law subscribers can access a complete checklist of search term best practices . Not a subscriber? Request a Demo .]

How can legal research help with drafting or strategy?

Before drafting a motion or brief, search for examples of what firm lawyers filed with the court in similar cases. You can likely find recent examples in your firm’s internal document system or search Bloomberg Law’s dockets. If possible, look for things filed before the same judge so you can get a quick check on rules/procedures to be followed (and by the same partner when possible so you can get an idea of their style preferences).

Careful docket search provides a wealth of information about relevant cases, jurisdictions, judges, and opposing counsel. On Bloomberg Law, type “Dockets Search” in the Go bar or find the dockets search box in the Litigation Intelligence Center .

If you do not know the specific docket number and/or court, use the docket search functionality Docket Key . Select from any of 20 categories, including motions, briefs, and orders, across all 94 federal district courts, to pinpoint the exact filing of choice.

Dockets can also help you access lots of information to guide your case strategy. For example, if you are considering filing a particular type of motion, such as a sanctions motion, you can use dockets to help determine how frequently your judge grants sanctions motions. You can also use dockets to see how similar cases before your judge proceeded through discovery.

If you are researching expert witnesses, you can use dockets to help determine if the expert has been recently excluded from a case, or whether their opinion has been limited. If so, this will help you determine whether the expert is a good fit for your case.

Dockets are a powerful research tool that allow you to search across filings to support your argument. Stay apprised of docket updates with the “Create Alert” option on Bloomberg Law.

Dive deeper into competitive research.

For even more competitive research insights, dive into Bloomberg Law’s Litigation Analytics – this is available in the Litigation tab on the homepage. Data here helps attorneys develop litigation strategy, predict possible outcomes, and better advise clients.

To start, under Litigation Analytics , leverage the Attorney tab to view case history and preview legal strategies the opposition may practice against you. Also, within Litigation Analytics, use the Court tab to get aggregate motion and appeal outcome rates across all federal courts, with the option to run comparisons across jurisdictions, and filter by company, law firm, and attorney.

Use the Judge tab to glean insights from cited opinions, and past and current decisions by motion and appeal outcomes. Also view litigation analytics in the right rail of court opinions.

Docket search can also offer intel on your opponent. Has your opponent filed similar lawsuits or made similar arguments before? How did those cases pan out? You can learn a lot about an opponent from past appearances in court.

How do I validate case law citations?

Checking the status of case law is essential in legal research. Rely on Bloomberg Law’s proprietary citator, BCITE. This time-saving tool lets you know if a case is still good law.

Under each court opinion, simply look to the right rail. There, you will see a thumbnail icon for “BCITE Analysis.” Click on the icon, and you will be provided quick links to direct history (opinions that affect or are affected by the outcome of the case at issue); case analysis (citing cases, with filter and search options), table of authorities, and citing documents.

How should I use technology to improve my legal research?

A significant benefit of digital research platforms and analytics is increased efficiency. Modern legal research technology helps attorneys sift through thousands of cases quickly and comprehensively. These products can also help aggregate or summarize data in a way that is more useful and make associations instantaneously.

For example, before litigation analytics were common, a partner may have asked a junior associate to find all summary judgment motions ruled on by a specific judge to determine how often that judge grants or denies them. The attorney could have done so by manually searching over PACER and/or by searching through court opinions, but that would take a long time. Now, Litigation Analytics can aggregate that data and provide an answer in seconds. Understanding that such products exist can be a game changer. Automating parts of the research process frees up time and effort for other activities that benefit the client and makes legal research and writing more efficient.

[Read our article: Six ways legal technology aids your litigation workflow .]

Tools like  Points of Law ,  dockets  and  Brief Analyzer  can also increase efficiency, especially when narrowing your research to confirm that you found everything on point. In the past, attorneys had to spend many hours (and lots of money) running multiple court opinion searches to ensure they did not miss a case on point. Now, there are tools that can dramatically speed up that process. For example, running a search over Points of Law can immediately direct you to other cases that discuss that same legal principle.

However, it’s important to remember that digital research and analytical tools should be seen as enhancing the legal research experience, not displacing the review, analysis, and judgment of an attorney. An attorney uses his or her knowledge of their client, the facts, the precedent, expert opinions, and his or her own experiences to predict the likely result in a given matter. Digital research products enhance this process by providing more data on a wider array of variables so that an attorney can take even more information into consideration.

[Get all your questions answered, request a Bloomberg Law demo , and more.]

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Legal Research Fundamentals

• Research Strategy Tips
• Secondary Sources

The Different Types of Case Law Research

Popular case law databases, using secondary sources, any good case, from an annotated statute, ai and smart searching.

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Generally, there are two types of case law research:

• Determining the case law that is binding or persuasive regarding a particular issue. Gathering and analyzing the relevant case law. 
• Searching for a specific case that applies the law to a set of facts in a particular way. 

These are two slightly different tasks. However, you can use many of the same case law search techniques for both of these types of questions. 

This guide outlines several different ways to locate case law. It is up to you to determine which methods are most suitable for your problem. 

When selecting a case law database, don't forget to choose the jurisdiction, time period, and level of court that is most appropriate for your purposes.

Note: Listed above are the databases that law students are most likely to use. It's possible that, once you leave law school, you will not have access to the same databases. Resources such as Fastcase  or Casetext may be your go-to. For any database, take the time to familiarize yourself with the basic and advanced search functions. 

Check out the Secondary Sources tab for information about how to locate a useful secondary source. 

Remember: secondary sources take the primary source law and analyze it so that you don't have to. Take advantage of the work the author has already done!

What do we mean by 'any good case'? 

A case that addresses the issue you care about. We can use the citing relationships and annotations found in case law databases to connect cases together based on their subject matter. You may find such a case from a secondary source, case law database search, or from a colleague.

How can we use one good case? 

1. Court opinions typically cited to  other cases to support their legal conclusions. Often these cited cases include important and authoritative decisions on the issue, because such decisions are precedential. 

2. Commercial legal research databases, including Lexis, Westlaw, and Bloomberg, supplement cases with  headnotes . Headnotes allow you to quickly locate subsequent cases that cite the case you are looking at with respect to the specific language/discussion you care about. 

3. Links to topics or Key Numbers. Clicking through to these allows you to locate other cases with headnotes that fall under that topic. Once you select a suitable Key Number, you can also narrow down with keywords. A case may include multiple headnotes that address the same general issue.

4.  Subsequent citing cases.  By reading cases that have cited to the case you've started with, you can confirm that it remains "good law" and that its legal conclusions remain sound. You can also filter the citing references by jurisdiction, treatment, depth of treatment, date, and keyword, allowing you to focus your attention on the most relevant sub-set of cases.

5. Secondary sources! Useful secondary sources are listed in the Citing References. This can be a quick way to locate a good secondary source. 

NOTE: Good cases may come in many forms. For example, a recent lower court decision might lead you to the key case law in that jurisdiction, while a higher court decision from a few years back might be more widely-cited and lead you to a wider range of subsequent interpretive authority (and any key secondary sources). 

What is an annotated statute?

An annotated statute is simply a statute enhanced with editorial content. In Lexis and Westlaw, this editorial content provides the following: 

Historical Notes about amendments to the statute. These are provided below the statutory text (Lexis) or under the History tab (Westlaw). 

Case Notes  provided either at the bottom of the page (Lexis) or under the Notes of Decisions tab (Westlaw). These are cases identified by the publisher as especially important or useful for illustrating the case law interpreting the statute. They are organized by issue and include short summaries pertaining to the holding and relevance are provided for each case.  

Other Citing References  allow you to locate all other material within Lexis and Westlaw that cite to the statute. This includes secondary sources (always useful) and all case law that cites to that specific section. You can narrow down by keywords, jurisdiction, publication status, etc. In Lexis, click the Shepard's link. In Westlaw, click the Citing References tab.

Lexis, Westlaw, and Bloomberg are all actively developing tools to lead you to cases more quickly. These include: 

Westlaw's recommendations and WestSearch Plus. These will show up in the "Suggestions" option that appears when you start typing into the search bar. 

Lexis Ravel View. When you search the case database in Lexis and click on the Ravel icon, you will see an interactive visualization of the citing relationships between the first 75 cases that appear in your results list, ranked by relevance.

Bloomberg's "Points of Law" feature in the Litigation Intelligence Center also allows users to visualize the citing relationships among cases meeting their search criteria.

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• Law and Method

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• October, 2016
• Stumbling Blocks in Empirical Legal Research: Case Study Research
• October 2016
• Artikel Stumbling Blocks in Empirical Legal Research: Case Study Research
• Artikel Statistical Analyses of Court Decisions: An Example of Multilevel Models of Sentencing
• Redactioneel Introduction Special Issue Stumbling Blocks in Empirical Legal Research

Citeerwijze van dit artikel: Lisa Webley, ‘Stumbling Blocks in Empirical Legal Research: Case Study Research’, 2016, oktober-december, DOI: 10.5553/REM/.000020

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• Introduction

Such legal research employs an empirical method to draw inferences from observations of phenomena extrinsic to the researcher. Putting it simply, legal researchers often collect and then analyse material (data) that they have read, heard or watched and subsequently make claims about how what they have learned may apply in similar situations that they have not observed (by inference). 1 x For insight into the extent to which legal researchers undertake empirical research and the lack of clarity around empirical methods in law see Epstein, L. and King, G. (2002) ‘The Rules of Inference’ Vol. 69 No. 1 The University of Chicago Law Review 1-133 at 3-6, Part I. One such form of empirical method is the case study, a methodological term which has been used by some researchers to describe studies that employ a combination of data sources to derive in-depth insight into a particular situation, by others to denote a particular ideological approach to research recognizing that the study is situated within its real-world context. 2 x Yin, R. K. (2014) Case Study Research Design and Methods (5th edn.) Sage Publications, 12-14. It is consequently a flexible definition encompassing approaches to the data and the stance of the researcher, 3 x See Hamel, J. with Dufour, S. and Fortin, D. (1993) Qualitative Research Methods Volume 2 , Sage Publications, ch 1. but its malleability has led some researchers incorrectly to stretch the term to encompass any study that focuses on one or a restricted number of situations. 4 x See Gerring, J. Case Study Research: Principles and Practices , Cambridge, Cambridge University Press, 2007 at 6. For a further discussion see Gerring, J. ‘What is a case study and what is it good for?’ (2004) Vol. 98 No 2 American Political Science Review 341-354. This looseness in definition in a legal context may perhaps be linked to confusion as between teaching and research case studies; some traditions in legal education employ a teaching method known also as ‘case study method’ which operates quite differently from its research counterpart. For a discussion of the differences between teaching and research case studies see Yin, 2014, 20 and for a discussion of teaching case studies see Ellet, W., (2007) The Case Study Handbook: How to Read, Discuss, and Write Persuasively About Cases , Boston MA, Harvard Business Review Press; Garvin, D. A. (2003) ‘Making the Case: Professional Education for the World of Practice.’ (Sept–Oct) Harvard Magazine 56-65. This has resulted in concerns that the definition has been co-opted as a means to explain any small n 5 x ‘n’ (number) is used to denote the number of observations in the study, N is used to describe the total number within the population when n denotes the sample observed. empirical study that has a focus on a particular subject, time-frame or location, and further that this has led to poor quality empirical research in law. 6 x For a discussion of the state of empirical research in law see Epstein and King, 2002. This is perhaps unsurprising, as law programmes tend to be very strong at teaching lawyers how to source, interrogate and then draw valid inferences from legal data sources such as cases and legislation, but less adept in the context of other types of data (for example survey data, interviews, non-legal documents and/or observation). 7 x See Webley, L. (2010) ‘Part III Doing Empirical Legal Studies Research Chapter 38 - Qualitative Approaches to ELS’ in Cane, P. and Kritzer, H. (eds.) Oxford Handbook of Empirical Legal Studies , Oxford, Oxford University Press. Case study method usually involves an array of research methods to generate a spectrum of numerical and non-numerical data that when triangulated provide a means through which to draw robust, reliable, valid inferences about law in the real world. 8 x For a discussion about the differences between numerical (quantitative) and non-numerical (qualitative) data see Webley, id; Epstein and King, 2002, at 2-3; King,G., Keohane, R. O., and Verba, S ., Designing Social Inquiry: Scientific Inference in Qualitative Research , Princeton NJ, Princeton University Press, 1994 at 6. It is relatively underused in empirical legal research. This article aims to make a contribution to those new to the case study method. It will examine the purpose of and why one may wish to undertake a case study, and work through the key elements of case study method including the main assumptions and theoretical underpinnings of this method. It will then turn to the importance of research design, including the crucial roles of the academic literature review, the research question and the use of rival theories to develop hypotheses in case study method. It will touch upon the relevance of identifying the observable implications of those hypotheses, and thus the selection of data sources and modes of analysis to allow for valid analytical inferences to be drawn in respect of them. In doing so it will consider, in brief, the importance of case study selection and variations like single or multi case approaches. Finally, it will conclude with some thoughts about the strengths and weaknesses associated with undertaking research via a case study method. It will address frequent stumbling blocks encountered by researchers, as well as ways so as to militate against common problems that researchers encounter. The discussion is necessarily cursory given the length of this article, but the footnotes provide much more detailed sources of guidance on each of the points raised here. This article is an introduction to a case study method rather than an analytical work on the method.

• 1. Case Study Method: Purpose of a Case Study, Why Undertake One?

Case study method falls within the social science discipline and as such has scientific underpinnings. The case study examines phenomena in context, where context and findings cannot be separated. Case study design is also sometimes used to investigate how actors consider, interpret and understand phenomena (e.g., law, procedure, policy) and therefore allows the researcher to study perceptions of processes and how they influence behaviour, for example to understand judges’ sentencing choices in a Dutch police court. 9 x Mascini, P., van Oorschot, I., Weenink, D. and Schippers, G., (2016) ‘Understanding judges’ choices of sentence types as interpretative work: An explorative study in a Dutch police court’, (37) (1) Recht der Werkelijkheid 32-49. This may help to understand how laws are understood, and how and why they are applied and misapplied, subverted, complied with or rejected. This can flow back into the legal and policy making processes, court procedure, sentencing, punishment, diversion of offenders etc., and may have a high impact as a result. The conditions precedent for case study method have been succinctly explained by Yin as follows:

‘doing a case study would be the preferred method, compared to the others, in situations when (1) the main research questions are “how” or “why” questions; (2) a researcher has little or no control over behavioural events; and (3) the focus of study is a contemporary (as opposed to entirely historical) phenomenon.’ 10 x Yin, 2014: xxxi and further 16-17.

The key points to note here are that a case study is a real-world in-depth investigation of a current complex phenomenon. The research will take place in situ (rather than in the library or moot court room) where the researcher cannot control the behaviour of research participants.

The purpose of the study is to learn how or why something happens or is the way it is, and this is achieved by collecting and triangulating a range of data sources to test or explore hypotheses. 11 x Triangulation is the term used to explain that a research question is considered from as many different standpoints as possible, using as many different data types as possible to permit a holistic examination of the question to see which explanations, if any, remain consistent across all data sources. It caters for a wide range of modes of enquiry: the investigation may be exploratory (explore why or how something is the way it is), descriptive (describe why or how something is the way it is) or explanatory (determine which of a range of rival hypotheses, theories etc. explain why or how X is the way it is). 12 x Yin, 2014: 5-6. Some categorise case studies as those designed to be theory orientated, and those designed to be practice orientated. 13 x See Dul, J. and Hak, T. (2008) Case Study Methodology in Business Research , Oxford: Elsevier 8-11, 30-59. Thereafter the design scope is very broad; the data collected may be qualitative and/or quantitative, collected via a variety of methods, and the case study may be a single case or be made up of a small number of cases. The breadth of data collected may be illustrated by Latour’s ethnography of the Conseil d’Etat in France, which studied the connections between human and non-human actors to explore their relationship with ‘the legal’ and ‘the Law’ is assembled in that court context. 14 x Latour, B. (2010) The Making of Law: An Ethnography of the Conseil D’Etat , Cambridge: Polity Press. Case study method is a way of thinking about research and a process through which one seeks to produce reliable, fair findings. It can provide deep insight into a particular situation, whether particular in time, in location or in subject-matter. 15 x For a discussion of ethnomethodological aims to study practical life as experienced in context as an end in itself, as experience is subjective and situational, see Small, M.L. ‘‘How many cases do I need?’ On science and the logic of case selection in field-based research’ (2009) Vol. 10 (1) Ethnography 5, 18. It may allow for transferable findings in respect of the theoretical propositions/hypotheses being examined if not to a population as would often be the situation in much quantitative research. 16 x For greater insight on this point see Lipset, S. M., Trow, M. and Coleman, J.S. (1956) Union Democracy: The Internal Politics of the International Typographical Union , New York: New York Free Press at 419-420; Yin, 2014, 21. For a discussion of the problems inherent in aping quantitative terminology in qualitative work see, Small, 2009, 10, and at 19 for further reading on the logic of case study selection and further reading on extended case method. It aims to examine rival hypotheses, propositions, potential explanations previously advanced (exploratory study), or to test findings from a previous case study examining similar phenomena in a new instance (a replication or confirmation study). 17 x Gerring, 2007, 346.

As described so far it is a research method that appears to have a lot in common with experiments and tests of statistical significance. But case study method differs markedly from a big data survey or double-blind experiment in that it seeks explicitly a phenomenon in its natural environment and (in most instances) without means to control for variables, including the behaviour of any participants. 18 x Although note that there are some scholars who believe that case study method can include elements of experimental testing, for example, Gerring, J. and McDermott, R. (2007) ‘An Experimental Template for Case Study Research’ Vol. 51 No. 3 American Journal of Political Science 688-701. One such study in law that has been described by some, if not by the researchers themselves, as a case study did include an experimental design within the battery of methods employed see: Moorhead, R., Sherr, A., Webley, L., Rogers, S., Sherr, L., Paterson, A. & Domberger, S. (2001) Quality and Cost: Final Report on the Contracting of Civil Non-Family Advice and Assistance Pilot (Norwich: The Stationery Office). Experiments aim to control some factors so as to test hypotheses under different conditions, quantitative studies attempt to control for environmental factors through sampling techniques and data collection instrument design so as to minimise their biasing effects, but case study method does not involve control of the environment, or control for the environment, instead it aims to harness context and work within it. It examines in great detail one situation (referred to as a case or unit) or a very small number of situations, to use context as a means to particularise the findings. It also seeks to explain which elements of context may mean that some of the findings are applicable to other situations and if so under what conditions. A case study tells the researcher about the case and the extent to which previous explanations are sustained, in some instances it may also allow the researcher to make claims that some of the findings can be applied to another case or cases too, although this is heavily dependent on the research design and its execution. 19 x Campbell, D.T. Foreword in Yin, 2014 xviii. But it is rarely, if ever, a method that can be used by one to want to make universal claims. A case is not a proxy for a sample of a population in a survey, for example, it is a study of a phenomenon in itself rather than a means through which to view the whole world. Having said that, samples can be used to help select cases in a sound manner. 20 x Seawright, J. and Gerring, J. (2008) ‘Case Selection Techniques in Case Study Research: A Menu of Qualitative and Quantitative Options’ Vol. 61 No. 2 Political Research Quarterly 294-308.

Case studies are only one of a number of ways to undertake socio-legal or criminological research and it is important to give proper consideration to the full range of research methods prior to making a final decision to adopt a case study method. 21 x Yin, 2014: chapter 1. It may be better to employ a different one: legal history; doctrinal legal study (legal cases, legislation, regulatory documents); a policy study (policy documents, communiqués etc.); a statistical analysis (an analysis of the number of different types of legal cases that go before the courts, their key features and what role these play in chances of success for the plaintiff); a large-scale survey; stand-alone interviews; or an experiment in a simulated setting (asking lawyers to read through some scenarios and explain what advice they would give to a client in those situations). But a case study could employ a number of these methods in combination, so how then does one determine whether case study method is right for one’s study? It will largely depend on the nature of the research question to be answered and one’s appetite for undertaking in-depth research aimed at achieving thick description (detailed description of how or why something is as it is) 22 x For a discussion see: Ryle, G. (1949). The Concept of Mind . London: Hutchinson; Lincoln, Y.S. and Guba, E.G. (1985). Naturalistic Inquiry . Newbury Park, CA: Sage Publications; Holloway, I. (1997). Basic Concepts for Qualitative Research . London: Blackwell Science. and/or triangulated findings derived from a range of data sources that develop a new theory or test existing rival theories. It is an intensive study, it requires extremely good planning and design and a robust approach to data analysis too.

• 2. Case Study Method: Research Design

Research design is of paramount importance in achieving a successful case study, especially so given that the study focuses on one or a small number of situations and the researcher’s in-depth knowledge of and immersion within that case may lead more readily to confirmation bias than in some other forms of study. 23 x Confirmation or interpretive bias of data is something we all have grapple with, as the natural human tendency is to place more weight on evidence that confirms our view than on evidence that contradicts it. Strong research design can assist with counter-balancing this to some extent, including the transformation of any expected finding into a hypothesis that one then seeks to falsify rather than to confirm. Research design begins with the choice of research topic, usually then followed by a review of any relevant academic literatures (perhaps beyond the boundaries of one’s own discipline, for example sociology, criminology, political science) to determine an appropriate research question, noting all possible answers to the research question that are posited in the literature. 24 x See Yin, 2014, chapter 1 for more information on the role of the literature review. During this iterative phase the research question will be further refined, so that it may be articulated with precision, which is particularly important for much case study research as the link between the question and the chosen case or cases is usually explicit and explained, consequently a clear research question is considered by many to be an essential starting point to aid the selection of cases to be examined. The rival hypotheses, theories or propositions that may answer the question should, normally, be similarly delineated and clarified, those that remain plausible answers to the research question should be retained and be supplemented with any others that the researcher considers to be alternative viable explanations. Other approaches may be used that are more inductive than deductive, as in the case of many ethnographic case studies such as Latour’s, for example. This phase is an intellectually demanding one, but it sets the foundation for a strong study that is easier to execute at the point of data collection. The literature review also helps to ensure one is up-to-date, that one does not make the same mistakes that earlier researchers have reported as hazards, and to add a theoretical depth to one’s study that aids sophisticated analysis. It may also help to identify useful data collection methods and instruments too. And so time spent on the literature review may be very profitable. So far the discussion has been very general and therefore a little abstract. At this stage it may help to consider a hypothetical research proposal for case study research and work though it as the article progresses. The researcher in our hypothetical scenario is interested in undertaking research on recent reforms to the use of family mediation in the family justice system in England and Wales. She knows that it is now compulsory in most instances for the person who is initiating any court proceedings in a divorce to have participated in at least one mediation information and advice session with the aim of negotiating an outcome in relation to children, money and/or property prior to initiating proceedings in court. She is clear on the law and the procedural issues but not clear on how effective have been these changes, and this is her broad area of interest. After completing her literature review she understands that the key aims of the reforms were to reduce the number of cases going to court by increasing the number of cases that result in negotiated agreements between the divorcing spouses and in doing so to reduce the cost and the time involved in reaching outcomes in divorce cases, reduce the need for people to use lawyers in the negotiating process, to reduce acrimony between the divorcing spouses and to reduce the negative effects on children. Further, the reforms were intended to promote more durable outcomes between divorcing spouses that could be renegotiated effectively if the arrangements for the children needed to be updated to meet changing circumstances. But the researcher still needs to work these insights into a research question before making a final decision on whether a case study is the best method by which to conduct the research. The next sub-section will consider the framing of the research question, and will include examples of how our researcher may draft her question to maximise her chances of undertaking a great study on her area of interest.

A. The Research Question

The process of defining the research question may be a painful, frustrating one but it could also be creative too. It may be necessary to spend a considerable period of time reading the literature so as to narrow down the research topic or statement to a manageable, novel and/or important and scholarly question. 25 x For more assistance with legal research questions refer to Epstein, L. (1995) Studying Law and the Courts in Lee Epstein (ed) Contemplating Courts , Cong Q, 1, 3-5. Some argue it should also seek to address a real world problem, although that is a controversial component and suggests that knowledge for knowledge’s sake is not a legitimate aim. 26 x See King, Keohane and Verba, 1994, 15. The development of a research topic into a research question with reference to the academic literature is sometimes described as the phase in which the researcher has a conversation or dialogue with the literature. This dialogue grounds the study, it also informs the study design, including the case selection and data to be collected. The research question (a statement that ends with a question mark) is made up of two key elements: its substance, the topic or issue that you wish to address and the form of the question ‘who, what, where, how, why’. 27 x See Yin, 2014, at 11, and see further Campbell, J.P., Daft, R.L., Hulin, C. L. (1982) What to Study: Generating and Developing Research Questions (Studying Organizations) , Sage Publications, for further thoughts on research questions The substance of the research question is not simply the topic but the specifics of the topic – is your study to be a contemporary one or a historical one? In what context are you operating? What precisely are you endeavouring to study? The form of the question is also important: as indicated previously, case study method is considered to be better suited to research questions framed in ‘how’ or ‘why’ terms. Single case studies are considered to be an excellent means by which to uncover and understand the processes or mechanisms that influence particular variables (known as process tracing 28 x On process tracing see: Collier, D. ‘Understanding Process Tracing’ Vol. 44 Political Science and Politics 823-830 and George, A. L. and Bennett, A. Case Studies and Theory Development in the Social Sciences , Cambridge, MA, MIT Press, 2005. For an excellent insight into how this has been used in a legal and policy context with reference to changes in Georgia’s tax laws see Ulriksen, M.S, and Dadalauri, N. ‘Single Studies and Theory-testing: The Knots and Dots of the Process-tracing Method’ (2014) International Journal of Social Research Methodology 1- 17. ), why or how different variables are related to each other, for example what influences legislative change or policy formation on a given topic in a given country at a particular time. They are also a sophisticated means through which to test empirically and deductively the congruence of rival explanations (theories or propositions), ‘to what extent’ or ‘how’ and ‘why’ different theories are borne out by the data. 29 x See Blatter, J. and Haverland, M. Designing Case Studies , Basingstoke, Palgrave MacMillan, 2012 at 145 who consider process tracing involves inductive reasoning to build theory and congruence testing involves deductive reasoning to test theories. The form of the initial research question can confound some researchers who initially phrase their question as a ‘what’ question and as a result unnecessarily rule out case study method. Questions can often be reframed, for example: ‘what have the prosecutorial authorities in England and Wales done to integrate victims of domestic violence into the criminal justice process?’ may be rephrased as ‘how have the prosecutorial authorities in England and Wales integrated victims of domestic violence into the criminal justice process?’. At this stage our hypothetical researcher is faced with some choices: should she consider ‘how have the reforms to family mediation used in the divorce context affected the durability and suitability of post-divorce arrangements in England and Wales?’ This would focus on the agreements whether agreed or adjudicated, their longevity, the extent to which they could be made to work after the divorce and how any amendments to arrangements were sought. Alternatively, she could ask ‘how have the reforms to family mediation affected the way in which divorces are conducted in England and Wales?’ This would examine the steps people took so as to get divorced but may also consider the divorcing couples’ perceptions about the process to assist with examining the policy to reduce acrimony, it could also address how much time and money they spent in the process and it could also elicit data on how constructive was their relationship and negotiations subsequent to the initial agreement or adjudication. It could also bring in the role of lawyers and/or consider the children’s experience of the divorce process too. The research design would then follow the focus of the question. Case studies are much easier to design when the research question is expressed clearly, the theory is used to provide possible answers that may be explored or tested and the boundaries of the study are articulated. Some people find it helps to break down a draft research question into its substance and its form, and describe the purpose of the study in a couple of lines too, 30 x Epstein and King suggest a range of possible purposes, at 59, including: to explore something that has not previously been studied; to attempt to settle a debate that has been ongoing within the literature; to examine a well-considered question but in a new way; to collect and analyse new data to seek to confirm or refute previous findings; to analyse an existing data set in a new or better way to seek to confirm or refute previous findings or to develop new ones. and then compare the extent to which all three are congruent and precise before moving on to the next phase of the design process. We shall consider the important role of theory in the next sub-section.

B. The Theory

Case studies afford the opportunity to observe a sequence of events or factors, to evaluate which produce an outcome and why, 31 x Peters, B.G. Comparative Politics: Theory and Method , Basingstoke, Palgrave, 1998 at 14. and to do so in their natural environment. One of the challenges for legal researchers, less so for criminological or sociological researchers who are often trained more fully in this regard, is the need to engage with theory before moving on to the next stage of research design. By theory I mean the explanations that have been posited in the academic literature for why or how something is the way that it is, or claims that suggest relationships between certain things. 32 x But interestingly, stance, or more accurately epistemology is of less significance to this research method than to many others. Case study method links the research question, research design, analysis and logic of inference to such an extent that is can accommodate a range of epistemological traditions from the realist to relativist/interpretivist. And thus scholars who consider that there are facts independent of our interpretation of them (in essence, hard facts operating in an objective reality) and scholars who consider all ‘facts’ to be local interpretations constructed through our own lenses, are able to operate within a case study framework. Having said that their choice of data sources, and their approach to data generation and analysis may well vary considerably. In this context a theory is a relatively precise speculative answer to a research question, which may have been developed by undertaking a study or by analysing others’ studies (a meta-analysis). And theories can be converted into hypotheses when considered in the light of a new research question. The use of theory is exemplified by Uriksen and Dadalauri’s case study on tax policy reform in Georgia which aimed to answer why and how Georgia initiated and managed to implement quite radical and substantial tax reforms between 1991 and 2005 and in doing so sought to interrogate theoretical explanations about the nature of policy reform in developing countries and further to develop a model that could be tested in other post-Soviet states. 33 x Ulriksen and Dadalauri, ibid. See further Dadalauri, N. Tax Policy Formation and the Transnationalizationof the Public Policy Arena; A Case Study of Georgia , Aarhus, Politica, 2011) Georgia was selected as a crucial case. The reasoning for this and also for the methods employed in this study are elegantly set out in the article cited above. In our hypothetical case study it may be possible, for example, to test the theory that mediated agreements lead to less acrimonious relationships between the divorced couple than do lawyer negotiated agreements. One could examine the theory that family mediation is a cheaper and faster alternative to lawyer negotiated settlements and that those mediated agreements are more durable and better suited to family circumstances. In doing so, one may test existing theories and/or to develop a new theory. Or one could test in the chosen context a single theory that is dominant or particularly novel. Our researcher could undertake further reading of the literature to add to these hypotheses and to refine them and eliminate those that are no longer plausible in the light of more detailed investigation. This is known as setting out ‘priors’, prior explanations raised in the academic literature. 34 x On the importance of the identification of priors see Beach, D. and Pedersen, R.B., ‘What is process tracing actually tracing? The three variants of process tracing methods and their uses and limitations’ Sept 1-4 2011 The American Political Science Association Annual Meeting , Seattle, WA as cited by Ulriksen and Dadalauri, ibid; and further Gerring, 2007 ibid. The researcher’s next task would be to consider what she would expect to observe in the study, were any of these hypotheses true (the observable implications of the hypotheses), for example, our researcher would expect to see that divorces conducted using family mediation would be settled through mediation, that the settlement process would cost less and be concluded quicker than in lawyer-led divorces, and that those that used family mediation would be more able to engage in constructive dialogue post-divorce and to renegotiate arrangements in respect of children without the need to resort to lawyers or to the courts. The researcher may also draw up a hypothesis that the agreements would be more durable and the outcomes for children more positive. This pre-emptive delineation of as many possible observable implications, and how they could be measured, would allow the researcher to plan how to conduct the study and to adopt an appropriate design more likely to lead to a robust answer to the research question. 35 x For more assistance on extracting observable implications and considering their measurement see Epstein and King, 2002, 70-76. But one needs to be able to articulate the theory converted into hypotheses with clarity, in order for an observation protocol to be developed. Further, it helps the research design if the researcher is able to pose rival theories or explanations so as to design the study to test for plausible alternative explanations too. For example, one of the rival theories in the family mediation study is that the kind of people who use mediation through to conclusion and the kind of people who either refuse to do so or who drop out without reaching a settlement are different, and those drawn to mediation are more consensus driven and better able to communicate with their spouse than are those who do not. This rival hypothesis would alert the researcher to the need to design the study to examine those who do conclude mediated agreements and those who do not in order to analyse this rival claim. A case study allows for the examination of complex interrelationships between variables in situ, and the theory helps to identify what those variables are.

C. The Selection of the ‘Case’ or ‘Cases’

Definitionally this is when it gets somewhat complicated, as ‘case’ can easily become confused with a ‘legal case’ and further a ‘case‘ can sometimes be confused with the same word used in a different context in quantitative research, a case meaning a single observation or a single data point. This has led some, such as Gerring, to suggest that it may be more accurate to refer to a case study as a unit study so as to underline that this type of study examines multiple things within one unit rather than examining one data source in one context. 36 x See Gerring, 2004, 342. See further King, Keohane, and Verba, 1994, 76-77. The selection of the case or cases is a profound one in any study of this kind. A case may be selected because it is critical to the research question, it is typical, atypical, it provides a longitudinal opportunity (study over time), or it is revelatory meaning that it allows insight where previously this has not be possible. 37 x See Yin, 2014, 51. The nature of the case, its boundaries and features and why it was selected should be set out clearly. 38 x Gerring, 2004, 344. There are often difficulties in establishing the boundaries of the case, the phenomenon under study, and the context that provides a background to the phenomenon but is not itself the object of enquiry. Gerring articulates this as the formal case (the phenomenon) and the informal cases (the penumbra of phenomena which are the context but which will need to be explored in a less formal way so as to distinguish the boundaries of the formal case). The informal units are peripheral, but may have bearing on the formal unit or case, and by considering these informal units at the beginning of the study, and close to its conclusion it will help the researcher to work out what is particular about the unit, and what is transferable to other units. The selection of the case should be guided by the extent to which this location in space, focus and/or time lends itself to construct validity, internal validity, external validity and reliability of design in respect to the research question. 39 x See Yin, 2014, chapter 2. Case studies are particularly prone to selection bias, meaning that the case is selected on the basis of the dependent variable rather than on the basis of the independent variable – selected because of an effect that has been noted rather than its cause when the nature of the cause is the real object of many ‘how’ or ‘why’ research study questions. 40 x See Geddes, B. Paradigms and Sand Castle: Theory Building and Research Design in Comparative Politics , Ann Arbor, University of Michigan Press, 2005. For example, in a legal context if we wanted to examine rival explanations for how a particular legislative reform, for example the introduction of same sex marriage in England and Wales, has had an impact on community cohesion between different religious and community groups, it may seem, on the face of it, a good idea to select a town like Brighton with a vibrant LGBT community as the case to be studied. After-all, the uptake of same-sex marriage has been very high in Brighton and so it could be considered to be a key site of study. However, Brighton is well known as a LGBT friendly town and people drawn to live there would tend to be very positive about the introduction of same-sex marriage. If the reason for the study was to consider whether tensions have emerged between community and religious groups with different views on marriage, then Brighton would not likely give much opportunity to examine these issues. It was LGBT friendly before the reform and it continues to be. And community and religious groups have worked well together before and after the change in the law. By selecting the case on the basis of the effect of the changed legal landscape, the high numbers of gay and lesbian marriages, we may have selected a case that is atypical or simply a poor unit within which to view the causes or the influences that led to the legislative reform. Researchers are prone to make this mistake when undertaking a deductive study to test the congruence of rival hypotheses in a context where they have insufficient knowledge about the independent variable (the causes) that gave rise to, say, the change in the law. There may be other factors to consider too: in our family mediation study, the researcher may choose to steer away from London as the case study location, if she is interested in ‘typical’ divorces given that London has a much greater than average number of high net worth divorces that include very large sums of money and property portfolios, in addition to many divorces involving non-British couples who married abroad. A solid grasp of the literature can help to alleviate this possibility of incorrect case selection along with detailed consideration of the relevant features of a range of possible case studies prior to final selection. Does selecting a multiple-case study limit the likelihood of such problems, further should the study be at one point in time or a repeated measure at different periods of time? A case study may be designed so as to allow for cross sectional analysis between two or more cases, and further a temporal variation may be introduced into this form of analysis too. Our researcher could study family mediation over time: the same divorces pre, during and post settlement and then later again to examine durability. Single, multiple or cross-sectional case studies often serve different purposes. Multiple case studies are more likely to be used when the causal relationship between an independent and dependent variables are being analysed, so that the interaction of the variables in different environments can be examined comparatively in different contexts (in an experimental protocol one would be able to manipulate the conditions so as to test the variables and thus the different hypotheses). For example, if the study was examining the relationship between violent crime rates and criminal justice sentencing policy to examine whether tougher criminal penalties for violent crime lead to a reduction in violent crime rates, and if tougher criminal penalties for lesser offences led to greater imprisonment levels and greater recidivism including an escalation of violent crime, then a multi-jurisdictional case study may allow for a better assessment of those by permitting different combinations of variables to be compared as against each other. In our family mediation study, the researcher may choose to use London as a crucial case study (with its unusual profile of divorcing spouses with a very wide range of asset values) alongside a more typical rural and a more typical urban location to consider the hypotheses under different conditions. However, it may also be possible to test the hypotheses in a single case study by charting the relationship between the variables over time, with particular attention being paid to the points in time when sentencing policy changed or crime rates dropped or raised, or when family mediation was first introduced, when it became established as a compulsory part of the system. 41 x But the difficulty with multi case studies is that specified conditions or features within individual cases may have more influence on the variables being studied than the variables that one are analysing across the studies. This may lead one to draw erroneous conclusions about causality. This single case study also illustrates the independent variable problem: to what extent are violent crime rates and/or sentencing policy more likely attributable to other societal changes evident at different points in time than each other? Without knowledge of this it is difficult to proceed. Sometimes the extent to which a case study is referred to as single or multiple is a matter of nomenclature, for example, Elliott and Kling’s study 42 x Elliott, M. and Kling, R. ‘Organizational Usability of Digital Libraries: Case Study of Legal Research in Civil and Criminal Courts’ (1997) Vol 48 (11) Journal of the American Society for Information Science 1023-1035. on the organisational usability of digital libraries, a case study of legal research in civil and criminal courts, could be described as a single case study (as in their study) because it addresses digital libraries in one context – legal research in courts – it is also geographically bounded to the Los Angeles County, but data is collected from a number of courts and thus it could be argued to be a multiple case study if each court were considered to be a case. The important distinction, however, is how that data are treated: if the data are pooled and analysed as a single unit then the case study is generally considered to be a single unit or single case study, if the data are analysed comparatively as between the sites of collection then it would generally be considered to be a multiple unit or multiple case study. Where comparisons are being made over time but within a unit then the terminology is often that of a single unit as data is both compared and pooled too. Single case study research is considered to be an excellent vehicle for exploratory and developmental research (as evidenced by the Georgia tax policy study and Dnes analysis of the nature of a particular type of contract – franchise contracts in the UK 43 x See Dnes, A.W. ‘A Case-Study Analysis of Franchise Contracts’ (1993) Vol. 28 Journal of Legal Studies 367-393. or Latour’s Conseil d’Etat study mentioned above 44 x See Latour, B. (2010) above. ), confirmatory research necessitates a design that allows the researcher robustly to test a small number of hypotheses forensically and it may be advisable to consider a multiple case study method to achieve this aim. 45 x Although note that Gerring, 2004, at 347 indicates that a single case study may credibly make causal claims, if, for example, the case has been selected as it is particularly representative of others or it is a critical or crucial case, see further: Eckstein, H. (1975) ‘Case Studies and Theory in Political Science’ in Regarding Politics: Essays on Political Theory, Stability, and Change, Berkeley: University of California Press, 1992). The family mediation case study conducted in London and a more typical urban and rural area is a good example of this, given that the types of divorce cases are likely to be quite different, the context is also different too, and so cost, duration, durability and acrimony could be tested under different conditions to see whether they held true in all conditions or were context or divorce type dependent. Sometimes researchers are inclined to use a multiple case study approach in the expectation that more cases (units) will provide more data and more comparable data that can be used to derive robust findings. However, data collected across multiple case studies is less rather than more likely to be comparable as the conditions within the case study cannot be manipulated or controlled by the researcher and yet environment is expected to have an impact on the data. 46 x Gerring indicates that researchers tend to face the choice between knowing more about less or less about more, 2014, 348. Where more than one case is selected, each subsequent addition should provide a more complete and accurate picture in respect of the research question, instead of attempting to provide greater representativeness (as indicated above, this is not the purpose of case study method). 47 x See Small, 2009, 24-26. If one wishes to make comparisons between case studies it is important to adhere closely to comparative methodology in the definition of the cases to be selected, the analysis of the relevant similarities and differences between those cases, the data to be collected, compared and why, and the likely limitations of the cross unit comparison. 48 x See Gerring, 2004 at 348. For guidance on comparative methodology in a legal context see: Van Hoecke, M. (2004) Epistemology and Methodology of Comparative Law , Portland, Oregon: Hart Publishing. Multiple cases studies are more difficult to accomplish successfully, and it is advisable to work out clearly what each of the case studies will contribute to answering the research question before finalising those to be the subject of the enquiry. The most appropriate design will be dependent on the research question selected and the hypotheses or propositions under investigation through the case study method. 49 x For a detailed discussion see Gerring, 2004 at 343.

D. The Selection of Data Sources, Data Generation and Collection

Strong research design logically links the research question(s) with the hypotheses, with the data generation and collection methods, which in turn should be logically linked with the data analysis methods employed too. By now the researcher is likely to have a very good idea of the types of data that may be relevant to the study (derived from documents, people, extant statistics, other artefacts like images), 50 x Yin sets out six sources of evidence: documents, archival records, interviews, direct observations, participant observation, physical artefacts, Yin, 2014, 105-118, and four principles of data collection: multiple sources of data; creation of a case study database; maintain the chain of evidence; exercise care when using data from electronic sources, at 118-129. having identified the substance, form and purpose of the question, the rival hypotheses that may contribute to answering the question, and the observable implications of those hypotheses and how they may be measured. Our researcher having drawn her broad question as ‘how have the reforms to family mediation affected the way in which divorces are conducted?’ and narrowed down the case study to a geographic location(s) or a type of divorcing couples or divorce context, will have considered the possible data sources as including the spouses, their children, the family mediators and lawyers, court files, mediation and lawyer negotiated agreements, official statistics and more. And so it should be possible to chart how the data collection and data analysis methods all fit together so as to allow the observable implications to be explored, the hypotheses proved, amended, or disproved and a rounded, reliable answer to the research question be achieved. But this design phase may also go beyond the identification and selection of data sources, it requires choices to be made about how data will be collected and measured. 51 x See Yin, 2014, chapter 3 for more information on what one needs to do before data collection begins, and chapter 4 on data collection itself. Each choice that is made, consciously, or unconsciously, will have an effect on the data that is captured and the reliability and validity of that data. And this in turn will affect the outcome of the study. Consequently, the design should be scrutinised to uncover the biases that may become entrenched within it, the study redesigned where necessary to eliminate or limit bias and any remaining biases be taken into account during the later analysis and reporting phases. 52 x See Small, 2009, 12-15. This will require a degree of reflection on data type (strengths and weaknesses in allowing observable implications to be explored), data selection (all data, if not all then what process is being used to select it and how may that skew the findings, known as selection bias); data collection (how is the data being derived, and is it raw data or is it material that requires a judgement to be made, for example how will we measure ‘satisfaction or ‘acrimony’ or ‘durability of an agreement’, how reliable and valid is the data collection instrument 53 x For a discussion of reliability and validity in measurement see Webley, 2010 and further Epstein and King, 2002, 80-99. ) and later too data analysis. It is also worth piloting each data collection exercise with a small number of observations so as to allow defects to be worked out, and experience in the field to allow for redesign too. And then one should collect as much data on each of the possible observable implications as is practicable, including data of different types generated or collected via different methods so as to allow for triangulation in respect of each hypothesis. For example, in Elliott and King’s study they collected data via observation, participant observation and interviews, analysed court documents and legal technology documents; 54 x Elliott and Kling, ibid at 1025. in Dnes’ study the data included franchise agreements and contracts, financial accounts and other financial data, interviews; 55 x Dnes, ibid at 369-370. and in Dadalauri’s study data were derived from primary sources (policy proposals, experts’ recommendations and the minutes of parliamentary sessions) and secondary sources (reports, media briefs, statistical sources) plus from semi-structured interviews with key actors in the policy process. 56 x Ulrikesn and Dadalauri, ibid at 13. Case study method necessitates a measure of flexibility in research design to allow for new knowledge to shape and improve the starting design, but that does not reduce the need for a robust design plan at the inception of the study. The design needs to be scrupulously documented, including challenges faced and amendments made so as to aid others to analyse the validity of the research design and to assess the extent to which the study findings are reliable and robust. 57 x For a discussion see King, Keohane and Verba, 1994, 12. Epstein and King suggest that legal scholars give the same attention to the recording, storage and analysis of data as they would expect of the police and prosecutors when securing the chain of evidence in a criminal case. 58 x Epstein and King, 2002, 24. And it is to data analysis that we now turn.

• 3. Case Study Method: Use of the Data, Inferences and Finding Meaning

Case study findings are reached through a process of logical valid inferences regardless of whether the data collected and analysed is qualitative, quantitative or both. 59 x For a discussion on this point see King, Keohane and Verba, 1994, chapter 1 ‘The Science in Social Science’. But first the data must usually be described in summary form, before being subjected to further analysis to consider what the data indicates about the various hypotheses and their observable implications in this case context. Subsequently, it is possible to attempt to derive descriptive inferences that suggest what these data on observable instances indicate about non-observables ones, in other words what findings one considers to be transferable to a non-observed context. The analysis may also allow for causal inferences to be made, that explain what effects would be expected to occur if certain conditions were fulfilled in this or another context. This is not dissimilar to data analysis in other types of empirical legal research and therefore it is considered only briefly here. However, case study method is structured with triangulation of data at the fore, allowing the researcher to reach robust findings reached by integrating analysis from multiple data points gathered using different methods. This section will briefly address data analysis, the drawing of inferences and the importance of demonstrating one’s working out, in turn.

A. Data Analysis

The first stage of data analysis is often validly to summarise the data collected in the light of the research question and hypotheses and anticipated observable implications, to summarise the numbers (mean, median, mode, standard deviation, range) and to summarise the text (for example, categorise and consider relationships between categories, or code and consider the frequency or codes). 60 x See Epstein and King, 2002, 25-29 for more information on quantitative data description. Different types of data will often be analysed using different methods or traditions, as illustrated by the way in which legal cases are analysed according to traditions accepted by lawyers, which is distinct from legal analysis of legislation, and policy analysis of policy documents: survey data would be analysed statistically, text based data (interviews, documents etc.) via the mode of analysis selected to interrogate and derive meaning from language, for example via grounded theory method, thematic coding, content analysis, hermeneutics etc. 61 x For a discussion of the different methods of text based data analysis see Yin, 2014, chapter 5 or Webley, 2010. There are a range of general strategies open to the researchers, some of which focus on the theoretical propositions, others aim to develop thick description, others still examine plausible rival explanations. 62 x See Yin, 2014, 136-142. Findings are considered robust where they are evidenced via multiple stands of data and its analysis. The use of multiple data sources to test each hypothesis allows the researcher to build up a thoroughly nuanced picture of the extent to which each hypothesis is sustained, needs to be refined, or rejected. The analysis will be conducted in the light of the research question parameters and also the hypotheses being examined by the research, as exemplified by the discussion in the Georgia tax policy case study. 63 x Ulriksen and Dadalauri, ibid. This process is likely to be iterative, in that data will often be analysed as one phase of data collection is complete and any lessons learned from that may lead to some reframing of the research question, reconsideration of the hypotheses, and amendments to the next phase of data collection yet to begin. The key is that, as with all social science methods, amendments to the question and methods, the analysis of the data and the inferences drawn from the data should be publicly explained and in sufficient detail so that they are replicable by others on the basis of the information provided in the write-up of the study; King, Keohane and Verba remind us that inferences lead to uncertain conclusions – inferences are not proven facts, they are propositions being advanced that are available to be tested by others. 64 x King, Keohane and Verba, 1994, 8. Conclusions remain tentative until replicated validly and consistently. The science and the rules of inference are important in allowing us to judge the validity and reliability of the findings, and these are closely interwoven with the research design and execution of the study.

B. Inferences

Case studies are often considered to be more useful when seeking to derive descriptive rather than causal inferences, as the researcher is not able to manipulate the environment so as to test propositions in such a way as to be sure that causal relationships have satisfactorily been established. Descriptive inferences are ‘the process of using the facts we know to learn about facts we do not know’ , by describing something that has been observed and inferring under what circumstances a similar pattern or occurrence may occur in a carefully defined unobserved situation. 65 x Epstein and King, 2002, 29. For example, if in our hypothetical family mediation study we learned that greater numbers of the divorcing clients who we interviewed/observed before the introduction of the compulsory mediation information and assessment meetings were aware that there was state funding available for family mediation, compared with the divorcing clients who we interviewed/observed after the introduction of these meetings then we may infer that this finding was likely to apply to divorcing clients outside our observed group too (all other things being equal). We do not know for certain that is accurate, as we only have data from our study participants, but our description of our findings has led us to infer something about those outside our observation group. Many doctoral candidates and early career academics baulk at the suggestion that descriptive inference is a valuable mode of analysis, as they associate ‘descriptive’ with the less positive feedback that they may have received in earlier work. But the pursuit of descriptive inferences is not a low-level aspiration in a context in which little is known about the case under scrutiny. Descriptive inferences allow for categorisation of findings which may lead on to further theory building and theory testing, categorisation goes to the heart of analysis development. So our finding above begs the question ‘why is this so?’ and we could either extend our study to answer this sub-question, or leave that for a later study. In some instances the inferences a researcher wishes to draw may be causal ones that infer an effect that will be caused by a set of defined factors occurring together. As an example, in our family mediation study we may wish to examine whether family mediation is more likely to be successful for couples with relatively similar educational backgrounds, medium to high incomes with both spouses in full-time employment, when compared with those who have unequal educational backgrounds, incomes and job-statutes and with low incomes. Where causal inferences are the point of the study, it may be possible to develop these with a well-chosen cross-case multi-case case study design. However, a causal inference first requires the identification of a causal mechanism (the process by which dependent variable A is affected by independent variable B, for example the causal mechanism for a defendant in the UK to be released from pre-trial detention (variable A) is a bail hearing in court (variable B)). 66 x See Epstein and King, 2002, 34-37 for help distinguishing between causal mechanisms and variables and causal effects. Case studies are often a really good means by which these mechanisms, or processes, may be uncovered – known as ‘process tracing’ whereby the researcher charts in detail the relationships between two or more variables and explores these connections to deduce those that are causal and those more likely to be coincidental. 67 x See Gerring, 2004, 348 and further Roberts, C., The Logic of Historical Explanation, Pennsylvania State University Press 1996, 66. Further, a single case study may allow a researcher to interrogate extant explanations that suggest causal implications, in other words to test predictions about what will happen in particular situations (assuming those situations are observable as part of the case study). This is known as ‘pattern-matching’. 68 x See Gerring, 2004, 348 and further Campbell, D. T. [1975] “‘Degrees of Freedom’ and the Case Study” in E. Samuel Overnman (ed) Methodology and Epistemology in Social Science , Chicago, University of Chicago Press: 1988, 380. This is where clarity about the purpose of the study becomes particularly important, as certain conditions will need to have been built into the research design for some analytical techniques. 69 x Yin, 2014, 142-168, provides five different analytical techniques: pattern-matching; explanation building; time-series analysis; logic models; and cross-case synthesis and suggests that after this phase the researcher will likely move on to work through all plausible alternative conclusions to examine whether the most likely conclusion is the only conclusion. The study will need to be designed with a very clear and narrow focus to achieve its aims. As indicated above, case studies may be entirely self-contained studies that provide in-depth knowledge of a single unit of analysis, but more often than not the researcher will wish for those findings to be considered applicable to situations that she/he has not observed. The challenge is to explain which findings are particular to the case study and which elements of the findings are relevant beyond the case study’s boundaries. 70 x Gerring, 2004, 345. It may be difficult to define this with precision, but where there is ambiguity it is safer to over explain and to over report the ambiguity and the possible range of inferences and their limitations rather than to over simplify and obfuscate the difficulty in reaching definitive findings. 71 x See Gerring, 2004, 346. Legal researchers are sometimes criticised for being vague in their explanations of the target of their inferences (to which other unobserved situations do these findings apply, and why?), or worse still their claims in the absence of evidence to prove that their inference is generalizable to a wide variety of situations. 72 x Epstein and King, 2002, 31. This may be a function of lawyers’ professional training as advocates, who in presentation would seek to persuade others to accept their position and who would gloss over inconvenient precedents. But lawyers are also trained to be forensic in seeking out the weaknesses of their arguments as well as those of their opponents and by harnessing these skills in the presentation of their case study findings; they should be able to display the highest standards of scientific reporting. Some of the ambiguities associated with inferences may be avoided if, as Gerring suggests, the scholar specifies clearly which propositions apply to which novel circumstances and exhibit and explain the evidence upon which this contention is based. 73 x Gerring, J. (2001) Social Science Methodology: A Criterial Framework , Cambridge, Cambridge University Press, 90-99. In other words, do the findings relate only to this case, are they intended to relate more broadly to similar cases and if so what marks out other situations as similar? Is similarity about time frame, location, a certain set of markers such types of participants, socio-economic, legal or political factors? And what is one’s evidence in support of this? The burden of proof always rests with the researcher. We shall turn to this in the next sub-section.

C. Reporting Findings

It can be challenging to know how to report one’s findings in an article or thesis, which is unsurprising when one considers that little attention is paid to this aspect of scholarship on doctoral legal programmes in many jurisdictions. 74 x See further Epstein and King, 2002. For assistance in how to report on cases studies and writing up and presentational considerations, including audience and purpose, see Yin, 2014, chapter 6. The rule is that one must provide as much detail as possible, at least enough to allow someone else to be able to replicate the study using only the information provided. Further, there needs to be sufficient discussion of the decisions taken, challenges faced and the consequent limitations of the findings so as to allow others to evaluate the reliability of one’s findings. As King et al. note: report uncertainty, be sceptical about causality, and consider rival hypotheses. 75 x King et al, 1996, 30-33. The process of interrogating one’s own decisions and inferences and reporting on them in full in the article or thesis may allow one to avoid the invidious charge made of many other legal scholars’ work. 76 x Epstein and King, 2002, 6-7. One suggestion is that legal scholars may wish to look for the weakest link in their chain of reasoning, something which lawyers are trained to do in a legal context, and then estimate how certain they are of their findings taking that weakness into account. 77 x Epstein and King, 2002, 50. However, other aspects of our professional training sometimes come into conflict with this approach: a research study is not an act of advocacy, and training as a lawyer may derail the process of empirical enquiry when lawyers unconsciously act for the client in their head and seek to persuade the outside world that their client’s view is a valid one, rather than to act as a legal social-scientist and demonstrate to other social scientists the extent to which their findings are valid, robust, reliable, and subject to limitation. 78 x See further Miller, A. S. ‘The Myth of Objectivity in Legal Research and Writing’ (1969) Vol. 18 Catholic University Law Review 290. For example, a researcher who is more in favour or less in favour of family mediation may inadvertently confirm their stance and steps need to be taken to lessen this risk. This role conflict is particularly problematic given that empirical legal research may lead to legal reform affecting large sections of the population and the findings confidently exhorted in the literature may be used to justify policy changes. 79 x Epstein and King, 2002, 8-10. Further, even if the research were not to be read outside of an academic environment, it is incumbent on all academics to produce research that is reliable and robust, lawyers are quick to critique legal scholarship that had been poorly executed and socio-legal scholarship should be treated no differently.

• 4. Conclusions: Why (Not to) Use Case Study Method?

Case study method is a powerful and engaging approach to research that has real utility in socio-legal and criminological research even if it has to-date been relatively little used. Our reticence to use it may be explained by the need for a researcher to be sufficiently adept with a range of social science research methods; (non-legal) empirical methods have historically had little treatment within undergraduate legal courses and relatively little attention even at a postgraduate level. 80 x Genn, H., Partington, M, and Wheeler, S. (2006) Law in the Real World: Improving Our Understanding of How Law Works Final Report and Recommendations , London: The Nuffield Foundation. Further, doctoral supervisors may feel inadequate to the task of supervising doctoral students proposing to undertake research through case study method and steer them towards a more standard mixed method approach such as a survey coupled with some interviews, or away from non-legal empirical methods altogether. But with some training, and a high degree of planning it is perfectly possible to undertake a good quality case study in a legal context and we can learn much from them. They are also an ideal means to focus on the particular and yet to draw analytical inferences to similar contexts too, something which lawyers are trained to do throughout their studies and a skill which they can bring to bear on a broader range of data than they otherwise often do. However, case study method is far more than focusing on a single situation, or ‘case’, it is far more than providing a temporal or physical boundary to our research endeavour. It requires us to adopt a structured and reflective approach to research design in many instances, to consider pre-emptively possible explanations (hypotheses) and rival propositions and to engage with theory at an early stage in a study. In a legal context case studies are generally, if not exclusively, more effective when: seeking to make descriptive rather than causal inferences; examining issues in depth rather than broadly and when the researcher is seeking to examine multiple sources of data so as to make comparisons within a case rather than between multiple cases. Further, they are also often more effective for seeking causal mechanisms rather than causal effects; for research that is exploratory rather than confirmatory; and when variations within the case selected are important for the study of the phenomenon. 81 x Gerring, 2004, 352. They are extremely useful when analysing how those involved in law and policy-making, the application of legal rules and procedures perceive these processes, how they react to them and how this influences the effectiveness of those rules, processes and procedures. The research process is an iterative and creative one that engages lawyers’ considerable analytical skills. As such case study method is worthy of a larger presence within the legal academic empirical tool-kit.

1 For insight into the extent to which legal researchers undertake empirical research and the lack of clarity around empirical methods in law see Epstein, L. and King, G. (2002) ‘The Rules of Inference’ Vol. 69 No. 1 The University of Chicago Law Review 1-133 at 3-6, Part I.

2 Yin, R. K. (2014) Case Study Research Design and Methods (5th edn.) Sage Publications, 12-14.

3 See Hamel, J. with Dufour, S. and Fortin, D. (1993) Qualitative Research Methods Volume 2 , Sage Publications, ch 1.

4 See Gerring, J. Case Study Research: Principles and Practices , Cambridge, Cambridge University Press, 2007 at 6. For a further discussion see Gerring, J. ‘What is a case study and what is it good for?’ (2004) Vol. 98 No 2 American Political Science Review 341-354. This looseness in definition in a legal context may perhaps be linked to confusion as between teaching and research case studies; some traditions in legal education employ a teaching method known also as ‘case study method’ which operates quite differently from its research counterpart. For a discussion of the differences between teaching and research case studies see Yin, 2014, 20 and for a discussion of teaching case studies see Ellet, W., (2007) The Case Study Handbook: How to Read, Discuss, and Write Persuasively About Cases , Boston MA, Harvard Business Review Press; Garvin, D. A. (2003) ‘Making the Case: Professional Education for the World of Practice.’ (Sept–Oct) Harvard Magazine 56-65.

5 ‘n’ (number) is used to denote the number of observations in the study, N is used to describe the total number within the population when n denotes the sample observed.

6 For a discussion of the state of empirical research in law see Epstein and King, 2002.

7 See Webley, L. (2010) ‘Part III Doing Empirical Legal Studies Research Chapter 38 - Qualitative Approaches to ELS’ in Cane, P. and Kritzer, H. (eds.) Oxford Handbook of Empirical Legal Studies , Oxford, Oxford University Press.

8 For a discussion about the differences between numerical (quantitative) and non-numerical (qualitative) data see Webley, id; Epstein and King, 2002, at 2-3; King,G., Keohane, R. O., and Verba, S ., Designing Social Inquiry: Scientific Inference in Qualitative Research , Princeton NJ, Princeton University Press, 1994 at 6.

9 Mascini, P., van Oorschot, I., Weenink, D. and Schippers, G., (2016) ‘Understanding judges’ choices of sentence types as interpretative work: An explorative study in a Dutch police court’, (37) (1) Recht der Werkelijkheid 32-49.

10 Yin, 2014: xxxi and further 16-17.

11 Triangulation is the term used to explain that a research question is considered from as many different standpoints as possible, using as many different data types as possible to permit a holistic examination of the question to see which explanations, if any, remain consistent across all data sources.

12 Yin, 2014: 5-6.

13 See Dul, J. and Hak, T. (2008) Case Study Methodology in Business Research , Oxford: Elsevier 8-11, 30-59.

14 Latour, B. (2010) The Making of Law: An Ethnography of the Conseil D’Etat , Cambridge: Polity Press.

15 For a discussion of ethnomethodological aims to study practical life as experienced in context as an end in itself, as experience is subjective and situational, see Small, M.L. ‘‘How many cases do I need?’ On science and the logic of case selection in field-based research’ (2009) Vol. 10 (1) Ethnography 5, 18.

16 For greater insight on this point see Lipset, S. M., Trow, M. and Coleman, J.S. (1956) Union Democracy: The Internal Politics of the International Typographical Union , New York: New York Free Press at 419-420; Yin, 2014, 21. For a discussion of the problems inherent in aping quantitative terminology in qualitative work see, Small, 2009, 10, and at 19 for further reading on the logic of case study selection and further reading on extended case method.

17 Gerring, 2007, 346.

18 Although note that there are some scholars who believe that case study method can include elements of experimental testing, for example, Gerring, J. and McDermott, R. (2007) ‘An Experimental Template for Case Study Research’ Vol. 51 No. 3 American Journal of Political Science 688-701. One such study in law that has been described by some, if not by the researchers themselves, as a case study did include an experimental design within the battery of methods employed see: Moorhead, R., Sherr, A., Webley, L., Rogers, S., Sherr, L., Paterson, A. & Domberger, S. (2001) Quality and Cost: Final Report on the Contracting of Civil Non-Family Advice and Assistance Pilot (Norwich: The Stationery Office).

19 Campbell, D.T. Foreword in Yin, 2014 xviii.

20 Seawright, J. and Gerring, J. (2008) ‘Case Selection Techniques in Case Study Research: A Menu of Qualitative and Quantitative Options’ Vol. 61 No. 2 Political Research Quarterly 294-308.

21 Yin, 2014: chapter 1.

22 For a discussion see: Ryle, G. (1949). The Concept of Mind . London: Hutchinson; Lincoln, Y.S. and Guba, E.G. (1985). Naturalistic Inquiry . Newbury Park, CA: Sage Publications; Holloway, I. (1997). Basic Concepts for Qualitative Research . London: Blackwell Science.

23 Confirmation or interpretive bias of data is something we all have grapple with, as the natural human tendency is to place more weight on evidence that confirms our view than on evidence that contradicts it. Strong research design can assist with counter-balancing this to some extent, including the transformation of any expected finding into a hypothesis that one then seeks to falsify rather than to confirm.

24 See Yin, 2014, chapter 1 for more information on the role of the literature review.

25 For more assistance with legal research questions refer to Epstein, L. (1995) Studying Law and the Courts in Lee Epstein (ed) Contemplating Courts , Cong Q, 1, 3-5.

26 See King, Keohane and Verba, 1994, 15.

27 See Yin, 2014, at 11, and see further Campbell, J.P., Daft, R.L., Hulin, C. L. (1982) What to Study: Generating and Developing Research Questions (Studying Organizations) , Sage Publications, for further thoughts on research questions

28 On process tracing see: Collier, D. ‘Understanding Process Tracing’ Vol. 44 Political Science and Politics 823-830 and George, A. L. and Bennett, A. Case Studies and Theory Development in the Social Sciences , Cambridge, MA, MIT Press, 2005. For an excellent insight into how this has been used in a legal and policy context with reference to changes in Georgia’s tax laws see Ulriksen, M.S, and Dadalauri, N. ‘Single Studies and Theory-testing: The Knots and Dots of the Process-tracing Method’ (2014) International Journal of Social Research Methodology 1- 17.

29 See Blatter, J. and Haverland, M. Designing Case Studies , Basingstoke, Palgrave MacMillan, 2012 at 145 who consider process tracing involves inductive reasoning to build theory and congruence testing involves deductive reasoning to test theories.

30 Epstein and King suggest a range of possible purposes, at 59, including: to explore something that has not previously been studied; to attempt to settle a debate that has been ongoing within the literature; to examine a well-considered question but in a new way; to collect and analyse new data to seek to confirm or refute previous findings; to analyse an existing data set in a new or better way to seek to confirm or refute previous findings or to develop new ones.

31 Peters, B.G. Comparative Politics: Theory and Method , Basingstoke, Palgrave, 1998 at 14.

32 But interestingly, stance, or more accurately epistemology is of less significance to this research method than to many others. Case study method links the research question, research design, analysis and logic of inference to such an extent that is can accommodate a range of epistemological traditions from the realist to relativist/interpretivist. And thus scholars who consider that there are facts independent of our interpretation of them (in essence, hard facts operating in an objective reality) and scholars who consider all ‘facts’ to be local interpretations constructed through our own lenses, are able to operate within a case study framework. Having said that their choice of data sources, and their approach to data generation and analysis may well vary considerably.

33 Ulriksen and Dadalauri, ibid. See further Dadalauri, N. Tax Policy Formation and the Transnationalizationof the Public Policy Arena; A Case Study of Georgia , Aarhus, Politica, 2011) Georgia was selected as a crucial case. The reasoning for this and also for the methods employed in this study are elegantly set out in the article cited above.

34 On the importance of the identification of priors see Beach, D. and Pedersen, R.B., ‘What is process tracing actually tracing? The three variants of process tracing methods and their uses and limitations’ Sept 1-4 2011 The American Political Science Association Annual Meeting , Seattle, WA as cited by Ulriksen and Dadalauri, ibid; and further Gerring, 2007 ibid.

35 For more assistance on extracting observable implications and considering their measurement see Epstein and King, 2002, 70-76.

36 See Gerring, 2004, 342. See further King, Keohane, and Verba, 1994, 76-77.

37 See Yin, 2014, 51.

38 Gerring, 2004, 344. There are often difficulties in establishing the boundaries of the case, the phenomenon under study, and the context that provides a background to the phenomenon but is not itself the object of enquiry. Gerring articulates this as the formal case (the phenomenon) and the informal cases (the penumbra of phenomena which are the context but which will need to be explored in a less formal way so as to distinguish the boundaries of the formal case). The informal units are peripheral, but may have bearing on the formal unit or case, and by considering these informal units at the beginning of the study, and close to its conclusion it will help the researcher to work out what is particular about the unit, and what is transferable to other units.

39 See Yin, 2014, chapter 2.

40 See Geddes, B. Paradigms and Sand Castle: Theory Building and Research Design in Comparative Politics , Ann Arbor, University of Michigan Press, 2005.

41 But the difficulty with multi case studies is that specified conditions or features within individual cases may have more influence on the variables being studied than the variables that one are analysing across the studies. This may lead one to draw erroneous conclusions about causality. This single case study also illustrates the independent variable problem: to what extent are violent crime rates and/or sentencing policy more likely attributable to other societal changes evident at different points in time than each other? Without knowledge of this it is difficult to proceed.

42 Elliott, M. and Kling, R. ‘Organizational Usability of Digital Libraries: Case Study of Legal Research in Civil and Criminal Courts’ (1997) Vol 48 (11) Journal of the American Society for Information Science 1023-1035.

43 See Dnes, A.W. ‘A Case-Study Analysis of Franchise Contracts’ (1993) Vol. 28 Journal of Legal Studies 367-393.

44 See Latour, B. (2010) above.

45 Although note that Gerring, 2004, at 347 indicates that a single case study may credibly make causal claims, if, for example, the case has been selected as it is particularly representative of others or it is a critical or crucial case, see further: Eckstein, H. (1975) ‘Case Studies and Theory in Political Science’ in Regarding Politics: Essays on Political Theory, Stability, and Change, Berkeley: University of California Press, 1992).

46 Gerring indicates that researchers tend to face the choice between knowing more about less or less about more, 2014, 348.

47 See Small, 2009, 24-26.

48 See Gerring, 2004 at 348. For guidance on comparative methodology in a legal context see: Van Hoecke, M. (2004) Epistemology and Methodology of Comparative Law , Portland, Oregon: Hart Publishing.

49 For a detailed discussion see Gerring, 2004 at 343.

50 Yin sets out six sources of evidence: documents, archival records, interviews, direct observations, participant observation, physical artefacts, Yin, 2014, 105-118, and four principles of data collection: multiple sources of data; creation of a case study database; maintain the chain of evidence; exercise care when using data from electronic sources, at 118-129.

51 See Yin, 2014, chapter 3 for more information on what one needs to do before data collection begins, and chapter 4 on data collection itself.

52 See Small, 2009, 12-15.

53 For a discussion of reliability and validity in measurement see Webley, 2010 and further Epstein and King, 2002, 80-99.

54 Elliott and Kling, ibid at 1025.

55 Dnes, ibid at 369-370.

56 Ulrikesn and Dadalauri, ibid at 13.

57 For a discussion see King, Keohane and Verba, 1994, 12.

58 Epstein and King, 2002, 24.

59 For a discussion on this point see King, Keohane and Verba, 1994, chapter 1 ‘The Science in Social Science’.

60 See Epstein and King, 2002, 25-29 for more information on quantitative data description.

61 For a discussion of the different methods of text based data analysis see Yin, 2014, chapter 5 or Webley, 2010.

62 See Yin, 2014, 136-142.

63 Ulriksen and Dadalauri, ibid.

64 King, Keohane and Verba, 1994, 8.

65 Epstein and King, 2002, 29.

66 See Epstein and King, 2002, 34-37 for help distinguishing between causal mechanisms and variables and causal effects.

67 See Gerring, 2004, 348 and further Roberts, C., The Logic of Historical Explanation, Pennsylvania State University Press 1996, 66.

68 See Gerring, 2004, 348 and further Campbell, D. T. [1975] “‘Degrees of Freedom’ and the Case Study” in E. Samuel Overnman (ed) Methodology and Epistemology in Social Science , Chicago, University of Chicago Press: 1988, 380.

69 Yin, 2014, 142-168, provides five different analytical techniques: pattern-matching; explanation building; time-series analysis; logic models; and cross-case synthesis and suggests that after this phase the researcher will likely move on to work through all plausible alternative conclusions to examine whether the most likely conclusion is the only conclusion.

70 Gerring, 2004, 345.

71 See Gerring, 2004, 346.

72 Epstein and King, 2002, 31.

73 Gerring, J. (2001) Social Science Methodology: A Criterial Framework , Cambridge, Cambridge University Press, 90-99.

74 See further Epstein and King, 2002. For assistance in how to report on cases studies and writing up and presentational considerations, including audience and purpose, see Yin, 2014, chapter 6.

75 King et al, 1996, 30-33.

76 Epstein and King, 2002, 6-7.

77 Epstein and King, 2002, 50.

78 See further Miller, A. S. ‘The Myth of Objectivity in Legal Research and Writing’ (1969) Vol. 18 Catholic University Law Review 290.

79 Epstein and King, 2002, 8-10.

80 Genn, H., Partington, M, and Wheeler, S. (2006) Law in the Real World: Improving Our Understanding of How Law Works Final Report and Recommendations , London: The Nuffield Foundation.

81 Gerring, 2004, 352.

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11 Finding and Using Case Law

Learning goals.

After reading this chapter, you will be able to

• Identify and use many search techniques to find relevant case law.
• Identify and use free, non-subscription platforms to find relevant case law.
• Conduct case law research more confidently and efficiently.

Where Do You Find Cases?

Most people conduct case law research online. Several websites provide free access to case law: Google Scholar , state and federal court websites, Library of Congress (only United States Reports), the Government Printing Office website (federal court opinions), Findlaw , Justia , and Caselaw Access Project . Fastcase is available through some state law libraries (i.e. the State of Oregon Law Library website ) and with state Bar Association membership. Keep in mind that freely available websites and platforms will have few or no tools to help with searching, and some provide cases only from certain jurisdictions or for certain date ranges.

Commercial platforms such as Casetext, Westlaw, Lexis, and Bloomberg will provide more editorial enhancements to increase your efficiency and effectiveness in finding results.

A note about print sources

Some academic and public law libraries still have case reporters in print. Case reporters are multi-volume sets that publish case law for different jurisdictions. Each state has reporters for their courts. Regional reporters publish cases for states in a certain geographic region. For example, the Pacific Reporter series publishes state cases from Alaska, Arizona, California, Colorado, Hawaii, Idaho, Kansas, Montana, Nevada, New Mexico, Oklahoma, Oregon, Utah, Washington, and Wyoming.

Federal cases are published in West’s Federal Supplement (U.S. District Court), West’s Federal Reporter (Federal Court of Appeals), West’s Supreme Court Reporter (U.S. Supreme Court decisions), Lexis’s United States Supreme Court Reports, Lawyers’ ed. (U.S. Supreme Court decisions), and United States Reports (official version of U.S. Supreme Court decisions). The citations you see for cases refer to the volume number, the reporter name, the page number, the court and date of the decision.

How Do You Find Cases?

Finding case law is an important part of your research process for most legal issues. You probably practiced case law research frequently in first year legal research and writing courses. However, most students feel that they need additional practice because they want more confidence in their results and more efficiency in their searches. This chapter will focus on practicing different methods of finding cases:

• Using secondary sources.
• Using statutory annotations.
• Using one good case.
• Using an index (West’s Topic and Key Number system, Lexis’s Case Notes system).
• Using natural language and terms and connectors (Boolean) searching.

Using Secondary Sources

Chapter 9 discusses different types of secondary sources and how to use them to learn background information about your legal issue and find primary sources of law. To reiterate, when you are starting your research and reading secondary sources, you might come across citations to cases important to that legal topic or issue. You might have noted some cases at that point; but if not, you can circle back to secondary sources to find citations to cases that seem important now that you know a bit more about your issue.

Use Statutory Annotations

If you found an important statute in your research, you probably looked at the annotations to the statute to start finding cases. (See Chapter 10 ).

Use One Good Case

If you found a citation to a relevant case in a secondary source or a statute, you can use that case to find other cases. There are several ways to use a good case to find more cases:

• Look at the cases cited in the good case.
• On Westlaw or Lexis, use the headnote tools in the good case to find other cases.
• On Westlaw or Lexis, use the citators (Key Cite and Shepards) in the good case to find other cases.
• On Google Scholar, use the Cited By and How Cited links to find other cases.

Practice Activity

For the trademark issue, use google scholar to find any relevant cases. Compare your results to the cases you find on a subscription platform such as Westlaw or Lexis.

Use an Index

Westlaw and Lexis have indexing systems that allow you to use legal topics and sub-topics to find cases. On Westlaw, the Topic and Key Number system indexes all U.S. case law; on Lexis, the Topics system provides that service.

You can use the index in a few ways:

• In a case headnote, look at the corresponding index terms or Key Numbers and click on the links to find other cases categorized under that index term or number.
• On Westlaw, find Key Numbers under the Content Types tab and either browse or term search in that list of Key Numbers.
• On Lexis, find the Topics tab and search or browse.
• Use the Key Number or Topic as a search term when you are doing Boolean searching (see below discussion of Boolean searching).

Use Natural Language and Boolean Searching

Most students are adept at using natural language to search for cases. An example of a natural language search is what constitutes trademark infringement on a beer label? Search algorithms have improved, so most platforms you use for searching will produce relevant results. However, most law librarians and legal research and writing professors will advise you to use multiple methods and tools to ensure that your results are both thorough and accurate. In this section, you will learn more about using terms and connectors (also called Boolean language) to search effectively for cases. Boolean searching may seem time-consuming and awkward at first, but with practice, it will become easier.

Boolean Searching

When you encounter a website or research platform, look for a “search help” link, which will inform you of search language and other search tips for that platform. Although the connectors will vary in meaning based on the website or platform you are using, the following are some common terms and connectors:

The connectors are processed in a specific order in your searches. After the connector OR, proximity connectors are processed from narrowest “” to broadest, AND. Sometimes, you need to use parentheses to change the order. For example, frisk! OR search! /3 seiz! should be expressed like this to run properly:  frisk! OR (search! /3 seiz!).

Suggested Activity:

In this activity, you will practice creating a Boolean (terms and connectors search) on the issue of trademark infringement in the context of beer labels and names. Try this search on several platforms, compare results, then revise your searches to try different combinations of terms.

Student added discussion and reflection questions

• Which case searching method do you feel most comfortable with?
• Have you used one type of searching method more than other in your research?
• What type of searching method is the most frustrating for you? Why?

Contribute a discussion or reflection question to this section.

Advanced Legal Research: Process and Practice Copyright © by Megan Austin is licensed under a Creative Commons Attribution 4.0 International License , except where otherwise noted.

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Theoretical Framework, Methodology and Case Selection

• First Online: 31 May 2024

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• Natalie Ann Ghosn 2  

This chapter provides an overview of the methodology employed in this study. This study takes an interdisciplinary approach to research. John C. Roberts, Chief Justice of the US Supreme Court, has argued that “Interdisciplinary research…can be one of the most productive and inspiring of human pursuits—one that provides a format for conversations and connections that lead to new knowledge.” The quantitative and qualitative methods employed in this study are reviewed here along with the process of case selection.

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Ghosn, N.A. (2024). Theoretical Framework, Methodology and Case Selection. In: Religion, Law and Dispute Resolution in Canada and the USA: Case Studies of Islam and Judaism. Palgrave Macmillan, Cham. https://doi.org/10.1007/978-3-031-59940-8_2

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Legal Dissertation: Research and Writing Guide

About this guide, video on choosing a topic, tools on westlaw, lexis and bloomberg, circuit splits, research methodologies, additional methodology resources, conducting a literature review, beginning research, writing style guides, citation guides, ask a librarian.

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About This Page

Choosing a topic can be one of the most challenging aspects of writing an extensive paper. This page has resources to help you find topics and inspiration, before you get started on the in-depth research process.

Related Guides

Citation and Writing Resources

Legal Research Tutorials

Secondary Sources for Legal Research

Methods of Finding Cases

Methods of Finding Statutes

Current Awareness and Alerting Resources

Compiling State Legislative Histories

Locating International and Foreign Law Journals

This guide contains resources to help students researching and writing a legal dissertation or other upper-level writing project. Some of the resources in this guide are directed at researching and writing in general, not specifically on legal topics, but the strategies and tips can still be applied.

The Law Library maintains a number of other guides on related skills and topics that may be of interest:

The Wells Library also maintains guides. A few that may be helpful for managing research can be found here:

Choosing a Topic

This video discusses tips and strategies for choosing a dissertation topic.

Note: this video is not specific to legal dissertation topics, but it may still be of interest as an overview generally.

The Bloomberg/BNA publication United States Law Week can be a helpful resource for tracking down the major legal stories of the day.  Log into Bloomberg Law, in the big search box, start typing United States Law Week and the title will appear in the drop down menu beneath the box. This publication provides coverage of top legal news stories, and in-depth "insight" features.

If you have a general idea of the area of law you wish to write about, check out the Practice Centers on Bloomberg. From the homepage, click the Browse link in the top left-hand corner. Then select Practice Centers and look for your area of law. Practice Centers are helpful because they gather cases, statutes, administrative proceedings, news, and more on the selected legal area.

Bloomberg has other news sources available as well. From the homepage, click the Browse link in the top left-hand corner. Then select News and Analysis, then select News or Analysis, and browse the available topics.

If you know what area of law you'd like to write about, you may find the Browse Topics feature in Lexis Advance helpful for narrowing down your topic. 

Log into Lexis Advance, click the Browse Topics tab, and select a topic.  If you don't see your topic listed, try using the provided search bar to see whether your topic is categorized as a sub-topic within this list. 

Once you click on a topic, a box pops up with several options.  If you click on Get Topic Document, you'll see results listed in a number of categories, including Cases, Legislation, and more.  The News and Legal News categories at the right end of the list may help you identify current developments of interest for your note.  Don't forget about the filtering options on the left that will allow you to search within your results, narrow your jurisdiction, and more.

Similar to Lexis Advance, Westlaw Edge has a Topics tab that may be helpful if you know what area of law you'd like to write about.

Log onto Westlaw Edge, and click on the Topics tab.  This time, you won't be able to search within this list, so if you're area is not listed, you should either run a regular search from the main search bar at the top or try out some of the topics listed under this tab - once you click on a topic, you can search within its contents.

What is great about the Topics in Westlaw Edge is the Practitioner Insights page you access by clicking on a topic.  This is an information portal that allows you quick access to cases, legislation, top news, and more on your selected topic.

In United States federal courts, a circuit split occurs whenever two or more circuit courts of appeals issue conflicting rulings on the same legal question. Circuit splits are ripe for legal analysis and commentary because they present a situation in which federal law is being applied in different ways in different parts of the country, even if the underlying litigants themselves are otherwise similarly situated. The Supreme Court also frequently accepts cases on appeal that involve these types of conflicted rulings from various sister circuits.

To find a circuit split on a topic of interest to you, try searching on Lexis and Westlaw using this method:

in the search box, enter the following: (circuit or court w/s split) AND [insert terms or phrases to narrow the search]

You can also browse for circuit splits on Bloomberg. On the Bloomberg homepage, in the "Law School Success" box, Circuit Splits Charts appear listed under Secondary Sources.

Other sources for circuit splits are American Law Reports (ALR) and American Jurisprudence (AmJur). These publications provide summaries of the law, point out circuit splits, and provide references for further research.

"Blawgs" or law-related blogs are often written by scholars or practitioners in the legal field.  Ordinarily covering current events and developments in law, these posts can provide inspiration for note topics.  To help you find blawgs on a specific topic, consider perusing the ABA's Blawg Directory or Justia's Blawg Search .

Research Methodology

Types of research methodologies.

There are different types of research methodologies. Methodology refers to the strategy employed in conducting research. The following methodologies are some of the most commonly used in legal and social science research.

Doctrinal legal research methodology, also called "black letter" methodology, focuses on the letter of the law rather than the law in action. Using this method, a researcher composes a descriptive and detailed analysis of legal rules found in primary sources (cases, statutes, or regulations). The purpose of this method is to gather, organize, and describe the law; provide commentary on the sources used; then, identify and describe the underlying theme or system and how each source of law is connected.

Doctrinal methodology is good for areas of law that are largely black letter law, such as contract or property law. Under this approach, the researcher conducts a critical, qualitative analysis of legal materials to support a hypothesis. The researcher must identify specific legal rules, then discuss the legal meaning of the rule, its underlying principles, and decision-making under the rule (whether cases interpreting the rule fit together in a coherent system or not). The researcher must also identify ambiguities and criticisms of the law, and offer solutions. Sources of data in doctrinal research include the rule itself, cases generated under the rule, legislative history where applicable, and commentaries and literature on the rule.

This approach is beneficial by providing a solid structure for crafting a thesis, organizing the paper, and enabling a thorough definition and explanation of the rule. The drawbacks of this approach are that it may be too formalistic, and may lead to oversimplifying the legal doctrine.

Comparative

Comparative legal research methodology involves critical analysis of different bodies of law to examine how the outcome of a legal issue could be different under each set of laws. Comparisons could be made between different jurisdictions, such as comparing analysis of a legal issue under American law and the laws of another country, or researchers may conduct historical comparisons.

When using a comparative approach be sure to define the reasons for choosing this approach, and identify the benefits of comparing laws from different jurisdictions or time periods, such as finding common ground or determining best practices and solutions. The comparative method can be used by a researcher to better understand their home jurisdiction by analyzing how other jurisdictions handle the same issue. This method can also be used as a critical analytical tool to distinguish particular features of a law. The drawback of this method is that it can be difficult to find material from other jurisdictions. Also, researchers should be sure that the comparisons are relevant to the thesis and not just used for description.

This type of research uses data analysis to study legal systems. A detailed guide on empirical methods can be found here . The process of empirical research involves four steps: design the project, collect and code the data, analyze the data, determine best method of presenting the results. The first step, designing the project, is when researchers define their hypothesis and concepts in concrete terms that can be observed. Next, researchers must collect and code the data by determining the possible sources of information and available collection methods, and then putting the data into a format that can be analyzed. When researchers analyze the data, they are comparing the data to their hypothesis. If the overlap between the two is significant, then their hypothesis is confirmed, but if there is little to no overlap, then their hypothesis is incorrect. Analysis involves summarizing the data and drawing inferences. There are two types of statistical inference in empirical research, descriptive and causal. Descriptive inference is close to summary, but the researcher uses the known data from the sample to draw conclusions about the whole population. Causal inference is the difference between two descriptive inferences.

Two main types of empirical legal research are qualitative and quantitative.

Quantitative, or numerical, empirical legal research involves taking information about cases and courts, translating that information into numbers, and then analyzing those numbers with statistical tools.

Qualitative, or non-numerical, empirical legal research involves extracting  information from the text of court documents, then interpreting and organizing the text into categories, and using that information to identify patterns.

Drafting The Methodology Section

This is the part of your paper that describes the research methodology, or methodologies if you used more than one. This section will contain a detailed description of how the research was conducted and why it was conducted in that way. First, draft an outline of what you must include in this section and gather the information needed.

Generally, a methodology section will contain the following:

• Statement of research objectives
• Reasons for the research methodology used
• Description and rationale of the data collection tools, sampling techniques, and data sources used, including a description of how the data collection tools were administered
• Discussion of the limitations
• Discussion of the data analysis tools used

Be sure that you have clearly defined the reasoning behind the chosen methodology and sources.

• Legal Reasoning, Research, and Writing for International Graduate Students Nadia E. Nedzel Aspen (2004) A guide to American legal research and the federal system, written for international students. Includes information on the research process, and tips for writing. Located in the Law Library, 3rd Floor: KF 240 .N43 2004.
• Methodologies of Legal Research: Which Kind of Method for What Kind of Discipline? Mark van Hoecke Oxford (2013) This book examines different methods of legal research including doctrinal, comparative, and interdisciplinary. Located at Lilly Law Library, Indianapolis, 2nd Floor: K 235 .M476 2013. IU students may request item via IUCAT.
• An Introduction to Empirical Legal Research Lee Epstein and Andrew D. Martin Oxford University Press (2014) This book includes information on designing research, collecting and coding data, analyzing data, and drafting the final paper. Located at Lilly Law Library, Indianapolis, 2nd Floor: K 85 .E678 2014. IU students may request item via IUCAT.
• Emplirical Legal Studies Blog The ELS blog was created by several law professors, and focuses on using empirical methods in legal research, theory, and scholarship. Search or browse the blog to find entries on methodology, data sources, software, and other tips and techniques.

Literature Review

The literature review provides an examination of existing pieces of research, and serves as a foundation for further research. It allows the researcher to critically evaluate existing scholarship and research practices, and puts the new thesis in context. When conducting a literature review, one should consider the following: who are the leading scholars in the subject area; what has been published on the subject; what factors or subtopics have these scholars identified as important for further examination; what research methods have others used; what were the pros and cons of using those methods; what other theories have been explored.

The literature review should include a description of coverage. The researcher should describe what material was selected and why, and how those selections are relevant to the thesis. Discuss what has been written on the topic and where the thesis fits in the context of existing scholarship. The researcher should evaluate the sources and methodologies used by other researchers, and describe how the thesis different.

The following video gives an overview of conducting a literature review.

Note: this video is not specific to legal literature, however it may be helpful as a general overview.

Not sure where to start? Here are a few suggestions for digging into sources once you have selected a topic.

Research Guides

Research guides are discovery tools, or gateways of information. They pull together lists of sources on a topic. Some guides even offer brief overviews and additional research steps specifically for that topic. Many law libraries offer guides on a variety of subjects. You can locate guides by visiting library websites, such as this Library's site , the Law Library of Congress , or other schools like Georgetown . Some organizations also compile research guides, such as the American Society of International Law . Utilizing a research guide on your topic to generate an introductory source list can save you valuable time.

Secondary Sources

It is often a good idea to begin research with secondary sources. These resources summarize, explain, and analyze the law. They also provide references to primary sources and other secondary sources. This saves you time and effort, and can help you quickly identify major themes under your topic and help you place your thesis in context.

Encyclopedias provide broad coverage of all areas of the law, but do not go in-depth on narrow topics, or discuss differences by jurisdiction, or  include all of the pertinent cases. American Jurisprudence ( AmJur ) and Corpus Juris Secundum ( CJS ) have nationwide coverage, while the Indiana Law Encyclopedia focuses on Indiana state law. A number of other states also have their own state-specific encyclopedias.

American Law Reports ( ALR ) are annotations that synopsize various cases on narrow legal topics. Each annotation covers a different topic, and provides a leading or typical case on the topic, plus cases from different jurisdictions that follow different rules, or cases where different facts applying the same rule led to different outcomes. The annotations also refer to other secondary sources.  

Legal periodicals include several different types of publications such as law reviews from academic institutions or organizations, bar journals, and commercial journals/newspapers/newsletters. Legal periodicals feature articles that describe the current state of the law and often explore underlying policies. They also critique laws, court decisions, and policies, and often advocate for changes. Articles also discuss emerging issues and notify the profession of new developments. Law reviews can be useful for in-depth coverage on narrow topics, and references to primary and other secondary sources. However, content can become outdated and researchers must be mindful of biases in articles. 

Treatises/Hornbooks/Practice Guides are a type of secondary source that provides comprehensive coverage of a legal subject. It could be broad, such as a treatise covering all of contract law, or very narrow such as a treatise focused only on search and seizure cases. These sources are good when you have some general background on the topic, but you need more in-depth coverage of the legal rules and policies. Treatises are generally well organized, and provide you with finding aids (index, table of contents, etc.) and extensive footnotes or endnotes that will lead you to primary sources like cases, statutes, and regulations. They may also include appendices with supporting material like forms. However, treatises may not be updated as frequently as other sources and may not cover your specific issue or jurisdiction.

Citation and Writing Style

• Legal Writing in Plain English Bryan A. Garner University of Chicago Press, 2001. Call # KF 250 .G373 2001 Location: Law Library, 3rd Floor Provides lawyers, judges, paralegals, law students, and legal scholars with sound advice and practical tools for improving their written work. The leading guide to clear writing in the field, this book offers valuable insights into the writing process: how to organize ideas, create and refine prose, and improve editing skills. This guide uses real-life writing samples that Garner has gathered through decades of teaching experience. Includes sets of basic, intermediate, and advanced exercises in each section.
• The Elements of Legal Style Bryan A. Garner Oxford University Press, 2002. Call # KF 250 .G37 2002 Location: Law Library, 1st Floor, Reference This book explains the full range of what legal writers need to know: mechanics, word choice, structure, and rhetoric, as well as all the special conventions that legal writers should follow in using headings, defined terms, quotations, and many other devices. Garner also provides examples from highly regarded legal writers, including Oliver Wendell Holmes, Clarence Darrow, Frank Easterbrook, and Antonin Scalia.
• Grammarly Blog Blog featuring helpful information about quirks of the English language, for example when to use "affect" or "effect" and other tips. Use the search feature to locate an article relevant to your grammar query.
• Plain English for Lawyers Richard C. Wydick Carolina Academic Press, 2005. Call # KF 250 .W9 2005 Location: Law Library, 3rd Floor Award-winning book that contains guidance to improve the writing of lawyers and law students and to promote the modern trend toward a clear, plain style of legal writing. Includes exercises at the end of each chapter.
• The Chicago Manual of Style University of Chicago Press, 2010. Call # Z 253 .U69 2010 Location: Law Library, 2nd Floor While not addressing legal writing specifically, The Chicago Manual of Style is one of the most widely used and respected style guides in the United States. It focuses on American English and deals with aspects of editorial practice, including grammar and usage, as well as document preparation and formatting.
• The Chicago Manual of Style (Online) Bryan A. Garner and William S. Strong The University of Chicago Press, 2017. Online edition: use the link above to view record in IUCAT, then click the Access link (for IU students only).
• The Bluebook Compiled by the editors of the Columbia Law Review, the Harvard Law Review, the University of Pennsylvania Law Review, and the Yale Law Journal. Harvard Law Review Association, 2015. Call # KF245 .B58 2015 Location: Law Library, 1st Floor, Circulation Desk The Bluebook: A Uniform System of Citation is a style guide that prescribes the most widely used legal citation system in the United States. The Bluebook is taught and used at a majority of U.S. law schools, law reviews and journals, and used in a majority of U.S. federal courts.
• User's Guide to the Bluebook Alan L. Dworsky William S. Hein & Co., Inc., 2015. Call # KF 245 .D853 2015 Location: Law Library, Circulation Desk "This User's Guide is written for practitioners (law students, law clerks, lawyers, legal secretaries and paralegals), and is designed to make the task of mastering citation form as easy and painless as possible. To help alleviate the obstacles faced when using proper citation form, this text is set up as a how-to manual with a step-by-step approach to learning the basic skills of citation and includes the numbers of the relevant Bluebook rules under most chapter subheadings for easy reference when more information is needed"--Provided by the publisher.
• Legal Citation in a Nutshell Larry L. Teply West Academic Publishing, 2016. Call # KF 245 .T47 2016 Location: Law Library, 1st Floor, Circulation Desk This book is designed to ease the task of learning legal citation. It initially focuses on conventions that underlie all accepted forms and systems of legal citation. Building on that understanding and an explanation of the “process” of using citations in legal writing, the book then discusses and illustrates the basic rules.
• Introduction to Basic Legal Citation (Online) Peter W. Martin Cornell Legal Information Institute, 2017. Free online resource. Includes a thorough review of the relevant rules of appellate practice of federal and state courts. It takes account of the latest edition of The Bluebook, published in 2015, and provides a correlation table between this free online citation guide and the Bluebook.
• Last Updated: Oct 24, 2019 11:00 AM
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5 Doctrinal Legal Research as a Means of Synthesizing Facts, Thoughts, and Legal Principles

• Published: January 2020
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Doctrinal legal research (DLR) is a predominant method employed by various classes of legal researchers. It involves rigorous analysis and creative synthesis of multiple doctrinal strands. Doctrines are central to juridical treatment of concepts. Since legal propositions have roots in economic, social, political, and psychological factors, an inter-disciplinary approach becomes essential. Because of the need to overarch changing values, social mores, and economic factors, doctrinal research collaborates with historical, comparative, analytical, and philosophical methods of research. DLR has a long history and definite procedure. Adoption of required steps systematises DLR. It has received criticism for excessively relying on concepts rather than social inputs; for ignoring the empirical techniques; for concentrating only on court decisions or legal rules. It differs from non-doctrinal legal research in the matter of data, venue of research, and time and money utilised. Because of social character of law there is need for collaboration between DLR and NDLR for positive outcome.

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leiden lawmethods portal

Case study research.

Last update: April 07, 2022

A legal scholar who uses the term ‘case’ will probably first think of a legal case. From a socio-legal perspective, the understanding of this concept is, however, slightly different. Case study research is a methodology that is useful to study ‘how’ or ‘why’ questions in real-life.

Over the last forty years, researchers from sociology, anthropology and various other disciplines have developed the case study research methodology dramatically. This can be confusing for legal researchers. Luckily, both Webley and Argyrou have written an article on case study research specifically for legal researchers. Webley writes, for example, that this methodology allows us to know ‘how laws are understood, and how and why they are applied and misapplied, subverted, complied with or rejected’. Both authors rely upon the realist tradition of case study research as theorised by Yin. Yin defines the scope of a case study as: “An empirical inquiry that investigates a contemporary phenomenon in depth and within its real-life context, when the boundaries between phenomenon and context are not clearly evident”.

Before you start collecting data for your case study, it is important to think about the theory and the concepts that you will want to use, as this will very much determine what your case will be about and will help you in the analysis of your data. You should then decide which methods of data collection and sources you will consult to generate a rich spectrum of data. Observations, legal guidelines, press articles… can be useful. Legal case study researchers usually also rely extensively on interviews. The meaning that interview participants give to their experiences with legal systems can uncover the influence of socio-economic factors on the law, legal processes and legal institutions.

Case studies strive for generalisable theories that go beyond the setting for the specific case that has been studied. The in-depth understanding that we gain from one case, might help to also say something about other cases in other contexts but with similar dynamics at stake. However, you need to be careful to not generalize your findings across populations or universes.

Argyrou, A. (2017) Making the Case for Case Studies in Empirical Legal Research. Utrecht Law Review, Vol.13 (3), pp.95-113

Flyvbjerg, B. (2006.) Five Misunderstandings about Case-Study Research, Qualitative Inquiry 12( 2), 219-245.

Gerring, J. (2004) What Is a Case Study and What Is It Good for? American Political Science Review 98( 2), 341-354.

Simons, H. (2014) Case Study Research: In-Depth Understanding in Context. In P. Leavy (Ed.), The Oxford Handbook of Qualitative Research, Oxford University Press.

Webley, L. (2016) Stumbling Blocks in Empirical Legal Research: Case Study Research. Law and Method, 10.

Yin, R. K. (2009). Case study research: Design and methods (4th Ed.). Thousand Oaks, CA: Sage.

Legal Methods

• Getting Started
• Introduction to Legal Research
• Secondary Sources
• Case Law Research
• Research with Citators
• Statutory Research
• Federal Legislative History
• Federal Administrative Law Research
• Electronic Legal Research
• Developing a Research Plan
• Tip - Subject Matter Service Research
• Legal Research and Writing Titles on West Academic Digital Library
• Legal Research and Writing Titles on LexisNexis Digital Library
• Legal Research and Writing Titles on Aspen Learning Digital Library

Reporters - Federal

The Law Library does not subscribe to the Federal Appendix, which includes cases from the U.S. Courts of Appeals that are not selected for publication in the Federal Reporter. These cases may be found in print in subject-specific looseleaf services and online via commercial databases and court websites.

Using the Digests

• Using the Digests by Westlaw

The Digest Research Process consists of four steps:

• Locating the correct digest set for the type of research you are doing
• Locating relevant topics and key numbers within the digest
• Reading the case summaries under the topics and key numbers
• Updating your research to make sure you find summaries of the most recent cases

Note: the Law Library does not have all the digests for all the other regional reporters. If a reporter does not have a corresponding digest, use the General or Decennial Digest series, or, if available, an individual state digest.

Reporters - State

The West National Reporter System organizes state court cases by region of the country. The map indicates the states that are included in each of the regional reporters.

Cases from Pennsylvania State appellate courts are found in the Atlantic Reporter:

• Atlantic Reporter, 3d (2010-date) 
• Atlantic Reporter, 2d (1939-2010)
• Atlantic Reporter (1895-1938)  

The other regional reporters and their abbreviations:

The Law Library also has the official reporters for the Pennsylvania appellate courts:

• Pennsylvania Reporter
• Pennsylvania State Reports (Supreme Court)
• Pennsylvania Superior Court Reports
• Pennsylvania Commonwealth Court Reports
• Pennsylvania District & County Reports
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Case Law Research: Methods of Finding Cases

• Introduction
• Abbreviations
• Find Cases in Print This link opens in a new window
• Methods of Finding Cases
• Citators/Updating Cases
• Search Tips

Finding Cases Using Headnotes

You may hear this referred to as a "case in hand" or "one good case" searching method. What this refers to is using an on point case that you have already found to find other relevant cases on your issue by using that case's headnotes. 

Headnotes:  Headnotes are very short entries on legal issues that are found at the beginning of a case. From a headnote you can click on a West Key Number , or a  Lexis Topic Document or Topic Index link to find additional cases.

• Westlaw:  After finding an on point case, read the headnotes and find the one most relevant to your issue. Click on a topic or key number link to see a list of all cases that fall under the same topic and key number. You can refine your search by choosing a different jurisdiction at the top of the page.
• Topic Document  - this is similar to looking at a digest document in WestlawNext; you will first be shown a list of cases under this topic, which you can narrow by jurisdiction or by searching within results; but you can also look at other types of legal materials that fall under this topic by selecting them from the tabs at the top.
• Topic Index  - this is similar to browsing the West Key Number System; you are presented with an expandable tree of legal topics, which you can search in the provided search bar at the top of the tab or browse.

Finding Cases Using Annotated Statutes

Annotated statutes contain references to other materials related to that particular statute, including case annotations. Case annotations are editorially selected summaries of cases that are illustrative of how a particular statute has been applied by the courts.

Finding Case Annotations

• WestlawNext  - In Westlaw case annotations are called  Notes of Decisions. They are available in three different places; the bottom of the document, in the column on the right, or in the Notes of Decisions tab at the top. 
• Lexis Advance  - In Lexis Advance annotations are called  Case Notes. They are available as you scroll past the statutory text; you can also jump to them by using the "Go to" menu near the top of the screen.

Cases in both are divided by topic to help you find the cases most relevant to your issue. 

Annotated Statutes are not available in Bloomberg Law .

Browsing by Subject

Westlaw:  In the Browse box, click the Tools tab and select the West Key Number System. From here you can search the West Key Number System from the search bar at the top or browse the list of 450 topics. If you click through to a digest document (a listing of cases that fall under a specific topic and key number), you select a different jurisdiction at the top of the screen and search within that listing. 

Lexis Advance:  Click the  Browse Topics  option at the top of the Lexis Advance home page.  You will see the topic index for Lexis Advance; you can either search with the search box provided or browse through the list of top-level topics which are further divided into sub-topics. You can add topics to a search or view the Topic Documents (See "Finding Cases using Headnotes").

Finding Cases Using Secondary Sources

Secondary sources , such as legal encyclopedias or the American Law Reports, are great places to start your research and can help you find relevant case law on your topic. 

Legal Encyclopedias : Legal encyclopedias are similar to encyclopedias that you may have used as an undergraduate, except that they focus on brief overviews of legal topics.  Different encyclopedias will have different features, but keeping an eye out for the following will help you locate additional case law:

• Case supplements  - often legal encyclopedia entries in Lexis and Westlaw will include a  supplement  following the article that lists a few pertinent cases.  You might also look to see whether the article contains an  illustration  of the subject matter; this would generally involve describing the treatment of this area of law in one or two key cases.
• Reference lists  - some legal encyclopedia entries in Lexis or Westlaw will contain a short list of references.  This could include  other secondary source materials , but may also include references to  pertinent topics and key numbers  in the West Key Number System, a case-finding tool.

American Law Reports : American Law Reports contain in-depth articles on legal topics. Each article has its own table of contents, index, and research references.  You can find relevant cases by looking at the:

• Westlaw -  Table of Cases, Laws, and Rules
• Lexis Advance -  Jurisdictional Table of Statutes and Cases
• Lexis Advance -  Table of References
• Westlaw -   Research References
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• Last Updated: Apr 18, 2024 2:47 PM
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Legal Research Methodology: Types And Approaches of Legal Research

Legal research methodologies explore unsettled legal questions, acquire and analyze relevant information, and apply findings to solve legal problems.

Let’s understand the definition of legal research methodologies and the types and approaches to Legal research methodologies.

Understand Legal Research Methodology

What is legal research methodology.

Legal research methodologies serve three main functions, exploring a legal problem, critically describing facts and legislation, and explaining or interpreting legal issues and concepts.

Why is a methodology needed in the first place?

The methodology is a means of inquiry to achieve these purposes in a meaningful way .

In legal research, the methodology;

• is a systematic inquiry that provides information to guide legal research,
• is the trained and scientific investigation of the principles and facts of any subject,
• helps the readers understand the research methods to discover the truth and evaluate the results’ validity,
• helps the researchers follow a consistent logic in research and prepare them to meet possible challenges,
• is also an important way to jam reliable and valid knowledge and explore the relationship between theory and practice.

Understanding research methods will help students conduct and write up their research monographs, dissertations, or theses systematically.

However, research methodology is different from research methods. ‘Research method’ usually implies all methods and techniques used to collect and process the data.

Thus, the method is a tool or technique such as a qualitative or quantitative method. It also includes interviews, case studies, or surveys.

On the other hand, research methodology refers to the body of methods that guide thinking within a specific field of study.

A methodology is a justification or rationale for the research approach and is concerned with the general strategy or approach of undertaking research.

Legal research methodology is a must.

It is vital for a researcher to know the research methodology and understand the underlying methodologies’ assumptions.

Researchers also need to know the criteria by which they can decide that certain methodologies will apply to certain problems.

Research methodology has been defined as the means of acquiring scientific knowledge. It has also been defined as a means to gather information and data to achieve a valid outcome.

Legal research methodology is simply a way of addressing and exploring unsettled legal questions or issues.

Legal research methodologies are techniques by which one acquires legally relevant information, analyzes, interprets, and applies them to resolve issues and present the findings.

Thus, legal research methodology is a scientific and systematic way to solve any legal question.

Legal research methodology also refers to rules of interpretation of legal problems and issues. It is a systematic effort to make an argument to arrive at a true or accurate account of the subject matter under consideration.

The researcher should explain properly why he uses a particular method to evaluate research results by the researcher himself or others. Adopting a particular methodology should stem from the research objective and purpose.

Types of Legal Research

Two types of Legal research are;

• Qualitative Research for Legal Research.
• Quantitative Research for Legal Research.

The main difference between qualitative and quantitative legal research is that; qualitative legal research is pure and applied research, concerned with the analysis of theories. Whereas quantitative legal research is concerned with testing the theories in the real world.

Depending upon the nature of the research question, legal research is also classified as descriptive and exploratory one.

Descriptive research attempts to describe a situation, problem, phenomenon, or behavior systematically. A description is concerned with making complicated things understandable and simple.

Exploratory research is undertaken to explore areas about which the researcher has little or no knowledge . It involves findings the reason for things, events and situations, showing why and how they have come to be what they are. Exploratory research enables the researcher to formulate problems for more in-depth study, develop hypotheses, and find the best solution.

Another popular distinction is between pure doctrinal research and non-doctrinal or empirical research.

While the former is theoretical work undertaken primarily to acquire new knowledge without a specific application, the latter is original work undertaken to acquire new knowledge with a specific practical application in view.

Doctrinal legal research is concerned with the analysis of legal theories, concepts, rules, and principles.

Most doctrinal legal research is based on the ‘black-letter law’ approach, which focuses on the knowledge of law found in the legal texts, legal theories, statutes, and court judgments with ‘little or no reference to the world outside the law.’

The doctrinal or ‘black-letter’ legal research aims to explain, systemize, and clarify the law on any particular topic by a distinctive mode of analysis.

In recent times, pure doctrinal legal research has been criticized for its rigidity, narrower scope, and inflexibility in addressing diverse contexts m which legal issues or situations arise and operate.

As a result, empirical or inter-disciplinary legal research emerged as a distinct type of legal scholarship in the law schools of western countries to study law in the broader social and political contexts.

This empirical and interdisciplinary legal research employs various social science and humanities methods. According to Epstein and King,

What makes research empirical is that it is based on observations of the world, in other words, data, which is just a term for facts about the world.

These facts may be historical or contemporary or based on legislation or case law, the results of interviews or surveys , or the outcomes of secondary archival research or primary data collection .

Another important classification is between qualitative and quantitative research.

Qualitative Research for Legal Research

Qualitative research is concerned with the explanation, interpretation, and understanding of phenomena or issues, or things. It relies primarily on human perception and understanding. It concerns the subjective assessment of the social or legal problem, situation, and attitude.

Qualitative research is critical in the behavioral sciences, where the aim is to discover the underlying motives of human behavior. A qualitative approach is concerned with the subjective assessment of attitudes, opinions, and behavior.

Quantitative research offers:

• richly descriptive reports of individual perceptions, attitudes, beliefs, views, and feelings,
• the meanings and interpretations are given to events and things, as well as their behavior;
• it displays how these are put together, more or less coherently and consciously,
• into frameworks that make sense of their experiences; and
• illuminates the motivations which connect attitudes and behavior, the discontinuities, or
• even contradictions between attitudes and behavior, or
• how conflicting attitudes and motivations are resolved in particular choices made.

Qualitative research is related to the analysis of some abstract idea, doctrine, or theory. It is generally used to develop new concepts or to reinterpret existing ones.

In qualitative research, researchers use analytical techniques and their views on the subject matter in question.

Qualitative research varifies the old established principles of laws. It may lead to discovering a new theory, refinement, or interpretation of an existing theory, principles, or legal issues.

On the other hand, empirical research relies on experience or observation alone, often without due regard for system and theory.

Qualitative research involves more explicit judgment, interpretation, or critical evaluation of a problem.

As far as legal study is concerned, the qualitative method is applied to analyze legal propositions or legal theories or doctrines and explore existing statutory propositions and cases in light of propositions or doctrines.

Qualitative research of law involves studying general theoretical questions about the nature of laws and legal systems, the relationship of law to justice and morality , and problems of application of law in a given society.

The main advantage of the qualitative method is that qualitative analysis draws on the interpretive skills of the researcher and opens up the possibility of more than one explanation being valid.

The main criticism of qualitative research is that it is too impressionistic and subjective. Qualitative findings rely too much on the researcher’s subjective assessment of views about what is significant.

The qualitative research findings tend to be open-ended, which is difficult to generalize: Many qualitative research works are doctrinal. Observation, interviewing, case study, examination, and analysis are the most common method of qualitative research.

Quantitative Research for Legal Research

Quantitative research for legal research is based on the measurement of quantity or amount. It consists of counting how frequently things happen. It applies to phenomena that can be expressed in terms of quantity. It is also known as the statistical method.

Because in quantitative research, researchers use an array of statistical methods and generalizations to determine the meaning of data.

It has been the dominant strategy for conducting socio-legal research. Quantitative methods often test or verify existing theories or hypotheses.

Quantitative research involves finding a solution to a real-life problem requiring an action or policy decision.

Quantitative research also tests many variables through the generation of primary data. The generalization process from sample to a population is an example of quantitative instead of qualitative research methodology.

Quantitative research can contribute new evidence, challenge old theories, and help conceptual clarification.

Usually, the quantitative approach involves generating data in quantitative form, which can be subjected to rigorous quantitative analysis formally and rigidly. Quantification can make it easier to aggregate, compare and summarise data.

Data can be collected from questionnaire surveys, fact-finding inquiries, and interviews. Data analysis is one of the important components of quantitative research.

The quantitative method is also sometimes termed an empirical approach as data are collected to test the hypothesis or examine the propositions or interpretations of findings.

Advantages of the Quantitative Legal Research Methods

• First, quantitative data are gathered by various forms of statistical techniques based on the principles of mathematics and probability. The analysis appears to be based on objective laws rather than the researcher’s values.
• Second, statistical tests of significance give researchers additional credibility in terms of their interpretations and their confidence in their findings.
• Third, quantitative data analysis provides a solid foundation for description and analysis.
• Fourth, large volumes of quantitative data can be analyzed relatively quickly, provided adequate preparation and planning have occurred in advance.
• Finally, tables and charts effectively organize quantitative data and communicate the findings to others.

The quantitative research method supplements traditional legal research to investigate the complexities of the law, legal actors, and legal activities.

Quantitative legal research is mostly applicable for conducting non-doctrinal, empirical, and socio-legal research . Objectivity remains the main aspect of quantitative research.

A set of rules or procedures should be followed in quantitative research, even though qualitative research tends to be more flexible.

While the researcher’s values and bias influence qualitative research, quantitative research seeks to report the findings objectively, and the role of the researcher is neutral.

Which One is Better – Quantitative or Qualitative Legal Research Methods?

To some extent, it depends on the training of the researcher and the nature of the research questions. But choosing one method in exclusion of others may be counterproductive for advancing legal scholarship.

Rather blending both quantitative and qualitative approaches can be the best way to accomplish the objectives of research work.

It is generally accepted that using more than one method strengthens the validity and credibility of the research.

5 Approaches to Legal Research

Legal research methodology is not particularly different from the research methodology used in other disciplines.

Nonetheless, it has some special attributes regarding source materials and ways of approaching the problems.

Researchers should be clear about the methodology and reasons for choosing a particular methodology.

Effective legal research is hardly possible without a proper understanding of research methodology . A researcher should justify the important methodological choices in their work.

Legal research may be of combination of methods for interpreting and applying legally relevant information. There are no single or universal approaches to legal research methodologies.

There are several approaches to research methodology , such as analytical, inter-disciplinary, comparative, and historical.

A particular type of methodology depends considerably upon the research question formulated and the sources of materials chosen.

Analytical Approach to Legal Research

Interdisciplinary approach to legal research, socio-legal approach to legal research, comparative approach to legal research, historical approach to legal research.

An analytical method is the most important and widely used in legal research. The analysis involves an explanation of the cause and effect of complex phenomena.

Analytical skill is crucial for any legal researcher. The analytical approach requires logical reasoning and interpreting laws to conclude .

Since laws are written in abstract and general terms by their nature, it is the researchers’ and judges’ task to apply those general rules to concrete factual circumstances, for which they apply logic and common sense to analyze and interpret the words in the law.

In most cases, the analytical approach deals with one or more legal concepts or legal theories.

Analytical research uses interpretive methods to examine cases, statutes, and other forms of law to seek out, construct, or reconstruct rules and principles.

An analytical approach is sometimes viewed as doctrinal research.

Doctrinal research of law provides a systematic exposition of the rules governing a particular legal category, analyses the relationship between the rules, explains areas of difficulty, and predicts future developments.

The sources of law have been the primary materials, law doctrines, case law, and legislation. The legal research is largely confined to an analysis of legal doctrine .

The salient characteristic of the analytical approach is its emphasis on the autonomy of law as an independent discipline or science.

Thus, the analytical approach of legal research can lead to ‘close reasoning.’

The analytical method serves the fundamental object of giving effect to the terms of a legislative instrument.

Analytical research is applied to dissect the terms of a provision, draw inferences from them, and apply the conclusions to resolve legal questions.

The most relevant aspects of the analytical approach are:

• what did the law-maker intend to achieve with the legislation under consideration?
• What is the underlying policy rationale of a piece of legislation?

In the analytical approach, the researcher should highlight the positive aspect of the law, e.g., what a legal situation is, and its normative aspect, e.g., what a legal situation should be.

Thus, it not only describes facts and circumstances but also defines parameters and interprets the facts. It involves applying critical judgment and developing one’s view of the situation.

The normative analysis concerns rational criticism and evaluation of legal doctrines and rules. Such judicial interpretation and process should only be a logical application of existing rules of law .

On the other hand, the positivistic approach holds that the conception of law is a coherent and complete system.

It implies a concerted effort to integrate disciplinary insights and apply the integrated insight to the study of problems.

The interdisciplinary approach of legal research advances the proposition that legal research ought not to content itself with the strictly legal but should also explore the interface between law and the other disciplines.

It integrates disciplines such as history, political science, economics and philosophy, and even different methodologies.

The interdisciplinary approach is distinguished from a multidisciplinary approach, which juxtaposes several disciplines without any attempt to integrate or synthesize aspects of their knowledge and perspectives.

The interdisciplinary approach requires looking at various aspects of the subject and viewing it from more than one perspective.

The interdisciplinary approach suggests the accommodation of sociology of law, economics and law, and law and technology within a single discourse to integrate and establish communicative links between disciplines.

The objective of interdisciplinary research is to combine knowledge, skills, and forms of research experience from two or several disciplines to transcend some of the theoretical and methodological limitations of the discipline in question and create a basis for developing a new form of analysis.

This is evident from integration because legal researchers and lawyers need to look at the law from a much broader angle than previously.

Inter-disciplinary research is “research designed to secure a deeper understanding of law as a social phenomenon, including research for the historical, philosophical, linguistic, economic, social or political implications of the law.”

On the other hand, it also seeks to evaluate the influence of other disciplines on legal scholarship. An interdisciplinary approach often produces results relevant to more than one discipline.

This interrelationship of disciplines is often reflected because many reputed law schools have designed their curriculum to include other subjects to explain a problem coherently and logically.

The interdisciplinary approach also suggests that social science methodologies and information are integrated into legal discourse.

The interdisciplinary approach as the interface of law and social science dates back to the Realist movement in the 1930s and 1940s. That movement highlighted the differences between ‘law in the books’ and ‘law in action.’

A sociological approach to law is one of the most characteristic features of modem jurisprudence—the socio-legal approach views law as a means of social control and change.

According to this approach, the law is essentially a social phenomenon.

The sociology of law seeks to explain the nature o law in terms of the empirical conditions within which doctrines and institutions exist in particular societies or social conditions.

Socio-legal research uses the theories and methods of social science to explore the operation of law, legal processes, and legal institutions.

The sociological approach tells us that law is a social phenomenon and works in a social setting instead of a textual approach.

According to the socio-legal approach, analysis of law is directly linked to the analysis of the social situation to which the law applies and should be put into the perspective of that situation.

It contrasts with the textual or ‘ black letter law ‘ approach, which emphasizes the text’s literal meaning. It calls for going beyond the ‘black letter law and investigating the social milieu against which law is enacted and applied.

On the relationship between law and sociology, Roger Cotterrell wrote succinctly.

Both law and sociology are concerned with the whole range of significant forms of social relationships.

And in practice, the criteria determining which relationships are significant are often similar, deriving from the same cultural assumptions or conceptions of policy relevance.

Furthermore, both legal and sociological inquiries typically seek to view these phenomena as part of, or potentially part of, an integrated social structure.

Thus, law and sociology share a fundamentally similar basic subject matter despite their radical differences in method and outlook.

Law is the practical craft of systematic control of social relations and institutions.

Sociology is the scientific enterprise that seeks systematic knowledge of them.

The socio-legal approach helps researchers to realize a closer understanding of the policy objectives of any legal rule.

The sociological views law as an emanation of social elements and depends not on state authority but on social compulsion.

The socio-legal research assesses the impact of legal doctrines upon society.

The sociological approach tries to investigate through empirical data how law and legal institutions affect human attitudes and what impact they create on society; assess the suitability of legal institutions to the needs of society.

It aims to understand legal and social phenomena, whereas the main concern of the traditional approach to jurisprudence is to undertake analytical-linguistic studies.

Using the law as an instrument of government policy requires understanding the socio-economic context in which the law works and what effects are likely to happen.

In socio-legal research, the law is considered one of the social policy tools.

A wide range of strategies is used in socio-legal research, from the statistical analysis of the survey to the interview analysis.

By using these strategies, the socio-legal approach addresses the following questions:

• what are the effects of law and the legal order on the social order?
• What are the effects of the social order on the legal order?
• What are the effects of the law on attitude, behavior, institutions, and organizations in society, maintenance, and change of society?
• What are the effects of attitudes, maintenance, behavior, institutions, and organizations in society, maintenance, and change of society on the law?

Each legal system has its history, fundamental principles and procedures, and forms of legal publication sources.

But in this globalized and interdependent world-the study of the law of other countries is assuming greater significance.

The law of foreign countries is increasingly becoming relevant in national court proceedings involving international transactions.

Interaction between various legal systems is sometimes described as a transnational legal system. The comparative method is advantageous for understanding the transnational legal system.

The comparative approach as a study of legal systems by comp comparison has assumed wider significance due to the ongoing globalization process.

With the growth of international and regional legal orders, understanding the forms and methods of comparative legal study has become essential to all those wishing to understand and engage in current legal debates.

Even one needs a comparative method to understand the law within one’s own country. The comparative method offers how the differences between the law of diverse countries and systems are analyzed.

In this way, a comparative study is appreciated for its benefit to the national legal system.

The comparative method aims to harmonize but not unify the world’s different laws and legal cultures.

Because often, the comparative approach may involve a comparison of two or more national legal systems.

But undoubtedly, comparative study helps to harmonize the laws of different countries.

In this sense, it has an international dimension.

The comparative approach takes the insider’s view on the legal systems studied and helps understand the institutional structure of concepts, thinking, and organizations of the systems in question.

The comparative method denotes different ways of addressing the same issue and finding differences. The comparison may give a fuller view of the subject under investigation.

However, the objective of the comparative method is not to draw mere similarities and dissimilarities.

Instead, it can enable a researcher to suggest a suitable solution to legal problems in light of a set of rules ideal for a given society.

The comparative method may confer the following 3 advantages:

• comparative research can throw doubts on the usefulness or firmly entrenched views;
• it may suggest a suitable solution to legal problems;
• A comparative study tends to aid in assembling which principles, applicable in the field concerned, are fundamental and which are secondary.

The historical approach looks at the evolution and development of a particular system of rules to provide useful contextual background and a fuller understanding of a certain legal discipline both for the researcher and the ultimate reader.

A historical approach examines the relations between law and events, showing how the law has been used at different times for different purposes and how it connects with interests and classes, political ends, and social movements.

The historical approach helps us understand how a particular institution or law evolved and why they need a change in the present context.

It takes the view that history has a significant role in explaining the current state of law, its past development, and likely future direction.

For example, to understand the institutional and jurisdictional aspects of the United Nations , a brief look at the whole concept and history of collective security and that of the League of Nations could be of some help.

The historical approach takes us from the past to the future. The historical approach serves to understand the present situation and shows the general trend of changes in laws.

As the present can not be properly understood without some knowledge about the past, the foremost purpose of the historical approach is to gain a clear perspective of the present.

But historical research can aim at the simply scholarly desire of the researcher to arrive at an accurate account of the past.

The sources of the historical approach include parliamentary debates on any legislative scheme, official reports of inquiry, case reports, newspaper reports, and journals.

The researcher should be careful about the authenticity and integrity of the documents.

In evaluating documents, the researcher should try to determine their completeness by verifying whether there have been additions or deletions to the original text.

The researcher should also maintain objectivity in interpreting historical events and show an adequate historical perspective of the issue under research.

For this purpose, primary sources or historical documents should be used as extensively as possible .

There is “no set legal methodology” that is applicable in all cases. It is not always possible to make clear-cut distinctions among the above ways of approaching the methodology.

A research paper that is concerned essentially with examining a subject may also involve comparison.

The researcher can choose a method best suited to questions and available sources. It depends upon the nature of the research question.

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Home » Blogs, News, Advice » Legal Education » Legal Research Techniques for Finding Relevant Case Law

Legal Research Techniques for Finding Relevant Case Law

• Aug 8, 2023
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Legal research is a systematic finding or ascertainment of law on an identified topic or in a given area. Additionally, it is a legal inquiry into the existing scholarship to advance the science of law.

Case law research and analysis is a prerequisite in the process of legal research. The method of acquiring this skill starts as soon as one embarks upon the journey of learning, studying, exploring and most importantly applying the law in a practical scenario.

Reading a case law, comprehending the rationale behind the decision and relating it to the present case to build a compelling and coherent argument is a skill every lawyer not only aspires to acquire. In order to become proficient and accomplished in their chosen profession, every lawyer must be skilled in finding relevant case laws through different means. One can learn several legal research techniques to find relevant case laws in legal databases.

Read on to find out several tools and techniques of Legal Research.

What are the different types of Legal Research?

Different types of research are crucial in case law research as they provide varied perspectives and information. Legal research helps identify relevant statutes, regulations, and precedents.

By utilizing these different research methods, researchers can obtain a comprehensive understanding of the legal landscape and make well-informed arguments or decisions in case law research. There are several legal research methodologies available for researchers to pursue their research.

1. Descriptive & Analytical Research

Descriptive research methodology focuses more on the “what” of the subject than the “why” of the research question. It is a description-based methodology that studies the characteristics of the population or phenomenon. The analytical research, however, uses the facts and information available to make a critical evaluation.

2. Qualitative & Quantitative Research

Qualitative legal research is a subjective method that relies on the researcher’s analysis of the controlled observations. In Quantitative Legal Research, one collects data from existing and potential data using sampling techniques like online surveys, polls, & questionnaires. The researcher can represent the outcomes of the quantitative study numerically.

3. Doctrinal & Empirical Research

In doctrinal legal research, the researcher analyses the existing statutory data to find the relevant answer to “What is the Law?” However, in empirical research, the researcher creates new data using several data collection methods and uses statistical tools to analyze it.

What is the Case Law Technique in Legal Research?

Case laws are the primary sources, i.e., the most original source, used in all legal research methodologies.

The case law technique in legal research methodology studies judicial opinions or decisions, and it is the technique of finding relevant legal precedents and principles. This is more challenging than it sounds because finding applicable case laws from legal databases is confusing and time-consuming, if the researcher is not well-versed with the tools.

Like legislation, case law can also be challenged and consequently change over time, as per the changing needs of the society. An earlier decision does not guarantee that it will always remain the law of the land.

Therefore, a lawyer must be skilled at finding, reading, and ascertaining the relevance, applicability and legal standing of any case law at a given point of time. . Thus, the importance of case law technique in legal research is quite significant as there can be no legal research without delving deep into judicial decisions.

How to Do Legal Research for Case Laws?

Before the time of the web, legal databases were in the form of multi-volume bulky books and digests. Researchers had to locate the cases manually with the help of case citations which was extremely time consuming. Though these periodicals are still available, online legal databases have overpowered them owing to their easy accessibility and time-saving tendency.

The Offline Tools for Legal Research

The researcher can locate case laws using the citations in printed law reporters. For example, the citation of a case is AIR 2017 SC 57, here the name of the Law Reporter in which the case law is published is AIR (All India Reporter), the year of the judgment is 2017, SC (Supreme Court) is the name of the Court, and the page number of the printed reporter on which the judgment can be found is 57.

The format of citation differs for every law reporter. Thus, the first step for locating the proper case law using citation is to decode the name of the law reporter.

The law reporters also categorize all the case laws. Thus, if the researcher does not know the case citation, they can find the case law as per its category.

The Online Tools for Legal Research

Using online tools for finding case laws is relatively easy. Even if the researcher does not know the name, citation, or year of the judgment, they can still find the same or similar judgments, thanks to these online tools’ intelligent features.

The only drawback is the majority of these tools require a heavy subscription fee which is not ideal for everyone.

What are the Methods of Locating Relevant Case Laws?

A researcher can locate relevant case laws if they know either of the following:

The identity of the case in law reporters, usually denoted in a combination of words & numbers.

For example: (1973) 4 SCC 225; AIR 1973 SC 1461

Case number

The official number the Court gives to a particular case.

For example: W.P.(C) 135 OF 1970

Name of the Parties

Either party’s name can be used for finding the case law.

For example: Petitioner’s name- Kesavananda Bharati Sripadagalvaru

Respondent’s name- State of Kerala

Jurisdiction

A researcher can filter their finding by deciding which Court’s judgment they want to look for.

A researcher can refer to various statute-based legal databases while finding a case law pertaining to a particular statute.

For example: The Labour Law Reporter publishes judgments specifically related to the Labour Laws of India.

How to Find Relevant Case Laws in India?

The offline tools.

The Supreme Court Reports (SCR) are the only authorized Indian law report series, and Supreme Court decisions should be cited from here whenever possible. However, Supreme Court Reporters are about four years behind in publishing the cases. Because of the long delay in the publication of the SCR. Therefore, it is entirely acceptable to cite a few unauthorized reports in academic and judicial work.

All India Reporter (AIR) is often cited in preference to the SCR, and in the Indian courts it has the status of an authorized series. The Law Library has the AIRs in print.

Online Tools

• Supreme Court of India at main.sci.gov.in . All the latest judgments by the Supreme Court of India are available here.
• Judgment Search Portal at judgments.ecourts.gov.in/pdfsearch/index.php : You can find the old Supreme Court Judgments here by entering any related keyword. It can be the citation of the case, name of the parties, case number, nature of the case, etc.
• SCC Online at www.scconline.com : India’s premier legal database with access to complete coverage of the Supreme Court, all High Courts, Tribunals and Commissions, Statutory Material and many foreign jurisdictions’ and International material. Individual registration is required to use this online legal database .
• AIROnline at www.aironline.in : Again, a subscription-based legal database which covers the judgments of all Supreme Courts, all High Courts, Tribunals and Commissions. The subscribers can find the case laws through citations, individual words, or exact phrases.
• Manupatra at www.manupatrafast.com : Indian case law coverage includes full-text decisions from the Supreme Court, all High Courts, the Federal Court, Privy Council and many tribunals. It covers judgments from the inception of each Court. The legislations covered include bare acts, amending acts, repealed legislation, subordinate legislation and bills from all jurisdictions. The primary material is grouped by topic; the secondary material comprises annotated legislation and commentary.
• Indian Kanoon at indiankanoon.org contains unreported decisions and is more up-to-date by a few days than the unreported cases on Manupatra or SCC Online. It goes back further (for example, Supreme Court cases started in 1947 in Kanoon and 1950 in Manupatra).

If you are looking for very recent decisions or if it is optional to access a reported version of the case, use Kanoon. Citation, party names, keywords, Court, date range etc., can search it. Researchers can also browse Indian Kanoon by Court and year. Indian Kanoon is also free!

However, Indian Kanoon tends to provide fewer parallel citations than Manupatra. It relies on user-generated content, lacks official verification, may contain outdated or inaccurate information, and sometimes does not provide comprehensive access to all relevant legal materials and judgments.

The approach to case law research has changed globally and in India due to technological advancement. According to statistics, roughly 33.9% of lawyers begin their research by using Google. Because Google is a generic search engine, the search results may sometimes be vague. Hence, case law databases or search engines that are tailor-made for lawyers emerge.

Lawctopus Law School’s Legal Research & Writing Course helps law students and legal professionals in understanding a crisp way to conduct Legal Research of different techniques and the right way to use legal databases.

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AI on Trial: Legal Models Hallucinate in 1 out of 6 (or More) Benchmarking Queries

A new study reveals the need for benchmarking and public evaluations of AI tools in law.

Artificial intelligence (AI) tools are rapidly transforming the practice of law. Nearly  three quarters of lawyers plan on using generative AI for their work, from sifting through mountains of case law to drafting contracts to reviewing documents to writing legal memoranda. But are these tools reliable enough for real-world use?

Large language models have a documented tendency to “hallucinate,” or make up false information. In one highly-publicized case, a New York lawyer  faced sanctions for citing ChatGPT-invented fictional cases in a legal brief;  many similar cases have since been reported. And our  previous study of general-purpose chatbots found that they hallucinated between 58% and 82% of the time on legal queries, highlighting the risks of incorporating AI into legal practice. In his  2023 annual report on the judiciary , Chief Justice Roberts took note and warned lawyers of hallucinations. 

Across all areas of industry, retrieval-augmented generation (RAG) is seen and promoted as the solution for reducing hallucinations in domain-specific contexts. Relying on RAG, leading legal research services have released AI-powered legal research products that they claim  “avoid” hallucinations and guarantee  “hallucination-free” legal citations. RAG systems promise to deliver more accurate and trustworthy legal information by integrating a language model with a database of legal documents. Yet providers have not provided hard evidence for such claims or even precisely defined “hallucination,” making it difficult to assess their real-world reliability.

AI-Driven Legal Research Tools Still Hallucinate

In a new  preprint study by  Stanford RegLab and  HAI researchers, we put the claims of two providers, LexisNexis (creator of Lexis+ AI) and Thomson Reuters (creator of Westlaw AI-Assisted Research and Ask Practical Law AI)), to the test. We show that their tools do reduce errors compared to general-purpose AI models like GPT-4. That is a substantial improvement and we document instances where these tools provide sound and detailed legal research. But even these bespoke legal AI tools still hallucinate an alarming amount of the time: the Lexis+ AI and Ask Practical Law AI systems produced incorrect information more than 17% of the time, while Westlaw’s AI-Assisted Research hallucinated more than 34% of the time.

Read the full study, Hallucination-Free? Assessing the Reliability of Leading AI Legal Research Tools

To conduct our study, we manually constructed a pre-registered dataset of over 200 open-ended legal queries, which we designed to probe various aspects of these systems’ performance.

Broadly, we investigated (1) general research questions (questions about doctrine, case holdings, or the bar exam); (2) jurisdiction or time-specific questions (questions about circuit splits and recent changes in the law); (3) false premise questions (questions that mimic a user having a mistaken understanding of the law); and (4) factual recall questions (questions about simple, objective facts that require no legal interpretation). These questions are designed to reflect a wide range of query types and to constitute a challenging real-world dataset of exactly the kinds of queries where legal research may be needed the most.

Figure 1: Comparison of hallucinated (red) and incomplete (yellow) answers across generative legal research tools.

These systems can hallucinate in one of two ways. First, a response from an AI tool might just be  incorrect —it describes the law incorrectly or makes a factual error. Second, a response might be  misgrounded —the AI tool describes the law correctly, but cites a source which does not in fact support its claims.

Given the critical importance of authoritative sources in legal research and writing, the second type of hallucination may be even more pernicious than the outright invention of legal cases. A citation might be “hallucination-free” in the narrowest sense that the citation  exists , but that is not the only thing that matters. The core promise of legal AI is that it can streamline the time-consuming process of identifying relevant legal sources. If a tool provides sources that  seem authoritative but are in reality irrelevant or contradictory, users could be misled. They may place undue trust in the tool's output, potentially leading to erroneous legal judgments and conclusions.

Figure 2:  Top left: Example of a hallucinated response by Westlaw's AI-Assisted Research product. The system makes up a statement in the Federal Rules of Bankruptcy Procedure that does not exist (and Kontrick v. Ryan, 540 U.S. 443 (2004) held that a closely related bankruptcy deadline provision was not jurisdictional). Top right: Example of a hallucinated response by LexisNexis's Lexis+ AI. Casey and its undue burden standard were overruled by the Supreme Court in Dobbs v. Jackson Women's Health Organization, 597 U.S. 215 (2022); the correct answer is rational basis review. Bottom left: Example of a hallucinated response by Thomson Reuters's Ask Practical Law AI. The system fails to correct the user’s mistaken premise—in reality, Justice Ginsburg joined the Court's landmark decision legalizing same-sex marriage—and instead provides additional false information about the case. Bottom right: Example of a hallucinated response from GPT-4, which generates a statutory provision that has not been codified.

RAG Is Not a Panacea

Figure 3: An overview of the retrieval-augmentation generation (RAG) process. Given a user query (left), the typical process consists of two steps: (1) retrieval (middle), where the query is embedded with natural language processing and a retrieval system takes embeddings and retrieves the relevant documents (e.g., Supreme Court cases); and (2) generation (right), where the retrieved texts are fed to the language model to generate the response to the user query. Any of the subsidiary steps may introduce error and hallucinations into the generated response. (Icons are courtesy of FlatIcon.)

Under the hood, these new legal AI tools use retrieval-augmented generation (RAG) to produce their results, a method that many tout as a potential solution to the hallucination problem. In theory, RAG allows a system to first  retrieve the relevant source material and then use it to  generate the correct response. In practice, however, we show that even RAG systems are not hallucination-free. 

We identify several challenges that are particularly unique to RAG-based legal AI systems, causing hallucinations. 

First, legal retrieval is hard. As any lawyer knows, finding the appropriate (or best) authority can be no easy task. Unlike other domains, the law is not entirely composed of verifiable  facts —instead, law is built up over time by judges writing  opinions . This makes identifying the set of documents that definitively answer a query difficult, and sometimes hallucinations occur for the simple reason that the system’s retrieval mechanism fails.

Second, even when retrieval occurs, the document that is retrieved can be an inapplicable authority. In the American legal system, rules and precedents differ across jurisdictions and time periods; documents that might be relevant on their face due to semantic similarity to a query may actually be inapposite for idiosyncratic reasons that are unique to the law. Thus, we also observe hallucinations occurring when these RAG systems fail to identify the truly binding authority. This is particularly problematic as areas where the law is in flux is precisely where legal research matters the most. One system, for instance, incorrectly recited the “undue burden” standard for abortion restrictions as good law, which was overturned in  Dobbs (see Figure 2). 

Third, sycophancy—the tendency of AI to agree with the user's incorrect assumptions—also poses unique risks in legal settings. One system, for instance, naively agreed with the question’s premise that Justice Ginsburg dissented in  Obergefell , the case establishing a right to same-sex marriage, and answered that she did so based on her views on international copyright. (Justice Ginsburg did not dissent in  Obergefell and, no, the case had nothing to do with copyright.) Notwithstanding that answer, here there are optimistic results. Our tests showed that both systems generally navigated queries based on false premises effectively. But when these systems do agree with erroneous user assertions, the implications can be severe—particularly for those hoping to use these tools to increase access to justice among  pro se and under-resourced litigants.

Responsible Integration of AI Into Law Requires Transparency

Ultimately, our results highlight the need for rigorous and transparent benchmarking of legal AI tools. Unlike other domains, the use of AI in law remains alarmingly opaque: the tools we study provide no systematic access, publish few details about their models, and report no evaluation results at all.

This opacity makes it exceedingly challenging for lawyers to procure and acquire AI products. The large law firm  Paul Weiss spent nearly a year and a half testing a product, and did not develop “hard metrics” because checking the AI system was so involved that it “makes any efficiency gains difficult to measure.” The absence of rigorous evaluation metrics makes responsible adoption difficult, especially for practitioners that are less resourced than Paul Weiss. 

The lack of transparency also threatens lawyers’ ability to comply with ethical and professional responsibility requirements. The bar associations of  California ,  New York , and  Florida have all recently released guidance on lawyers’ duty of supervision over work products created with AI tools. And as of May 2024,  more than 25 federal judges have issued standing orders instructing attorneys to disclose or monitor the use of AI in their courtrooms.

Without access to evaluations of the specific tools and transparency around their design, lawyers may find it impossible to comply with these responsibilities. Alternatively, given the high rate of hallucinations, lawyers may find themselves having to verify each and every proposition and citation provided by these tools, undercutting the stated efficiency gains that legal AI tools are supposed to provide.

Our study is meant in no way to single out LexisNexis and Thomson Reuters. Their products are far from the only legal AI tools that stand in need of transparency—a slew of startups offer similar products and have  made   similar   claims , but they are available on even more restricted bases, making it even more difficult to assess how they function. 

Based on what we know, legal hallucinations have not been solved.The legal profession should turn to public benchmarking and rigorous evaluations of AI tools. 

This story was updated on Thursday, May 30, 2024, to include analysis of a third AI tool, Westlaw’s AI-Assisted Research.

Paper authors: Varun Magesh is a research fellow at Stanford RegLab. Faiz Surani is a research fellow at Stanford RegLab. Matthew Dahl is a joint JD/PhD student in political science at Yale University and graduate student affiliate of Stanford RegLab. Mirac Suzgun is a joint JD/PhD student in computer science at Stanford University and a graduate student fellow at Stanford RegLab. Christopher D. Manning is Thomas M. Siebel Professor of Machine Learning, Professor of Linguistics and Computer Science, and Senior Fellow at HAI. Daniel E. Ho is the William Benjamin Scott and Luna M. Scott Professor of Law, Professor of Political Science, Professor of Computer Science (by courtesy), Senior Fellow at HAI, Senior Fellow at SIEPR, and Director of the RegLab at Stanford University. 

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Associate Editor for Simply Psychology

BSc (Hons) Psychology, MSc Psychology of Education

Olivia Guy-Evans is a writer and associate editor for Simply Psychology. She has previously worked in healthcare and educational sectors.

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Case studies are in-depth investigations of a person, group, event, or community. Typically, data is gathered from various sources using several methods (e.g., observations & interviews).

The case study research method originated in clinical medicine (the case history, i.e., the patient’s personal history). In psychology, case studies are often confined to the study of a particular individual.

The information is mainly biographical and relates to events in the individual’s past (i.e., retrospective), as well as to significant events that are currently occurring in his or her everyday life.

The case study is not a research method, but researchers select methods of data collection and analysis that will generate material suitable for case studies.

Freud (1909a, 1909b) conducted very detailed investigations into the private lives of his patients in an attempt to both understand and help them overcome their illnesses.

This makes it clear that the case study is a method that should only be used by a psychologist, therapist, or psychiatrist, i.e., someone with a professional qualification.

There is an ethical issue of competence. Only someone qualified to diagnose and treat a person can conduct a formal case study relating to atypical (i.e., abnormal) behavior or atypical development.

 Famous Case Studies

• Anna O – One of the most famous case studies, documenting psychoanalyst Josef Breuer’s treatment of “Anna O” (real name Bertha Pappenheim) for hysteria in the late 1800s using early psychoanalytic theory.
• Little Hans – A child psychoanalysis case study published by Sigmund Freud in 1909 analyzing his five-year-old patient Herbert Graf’s house phobia as related to the Oedipus complex.
• Bruce/Brenda – Gender identity case of the boy (Bruce) whose botched circumcision led psychologist John Money to advise gender reassignment and raise him as a girl (Brenda) in the 1960s.
• Genie Wiley – Linguistics/psychological development case of the victim of extreme isolation abuse who was studied in 1970s California for effects of early language deprivation on acquiring speech later in life.
• Phineas Gage – One of the most famous neuropsychology case studies analyzes personality changes in railroad worker Phineas Gage after an 1848 brain injury involving a tamping iron piercing his skull.

Clinical Case Studies

• Studying the effectiveness of psychotherapy approaches with an individual patient
• Assessing and treating mental illnesses like depression, anxiety disorders, PTSD
• Neuropsychological cases investigating brain injuries or disorders

Child Psychology Case Studies

• Studying psychological development from birth through adolescence
• Cases of learning disabilities, autism spectrum disorders, ADHD
• Effects of trauma, abuse, deprivation on development

Types of Case Studies

• Explanatory case studies : Used to explore causation in order to find underlying principles. Helpful for doing qualitative analysis to explain presumed causal links.
• Exploratory case studies : Used to explore situations where an intervention being evaluated has no clear set of outcomes. It helps define questions and hypotheses for future research.
• Descriptive case studies : Describe an intervention or phenomenon and the real-life context in which it occurred. It is helpful for illustrating certain topics within an evaluation.
• Multiple-case studies : Used to explore differences between cases and replicate findings across cases. Helpful for comparing and contrasting specific cases.
• Intrinsic : Used to gain a better understanding of a particular case. Helpful for capturing the complexity of a single case.
• Collective : Used to explore a general phenomenon using multiple case studies. Helpful for jointly studying a group of cases in order to inquire into the phenomenon.

Where Do You Find Data for a Case Study?

There are several places to find data for a case study. The key is to gather data from multiple sources to get a complete picture of the case and corroborate facts or findings through triangulation of evidence. Most of this information is likely qualitative (i.e., verbal description rather than measurement), but the psychologist might also collect numerical data.

1. Primary sources

• Interviews – Interviewing key people related to the case to get their perspectives and insights. The interview is an extremely effective procedure for obtaining information about an individual, and it may be used to collect comments from the person’s friends, parents, employer, workmates, and others who have a good knowledge of the person, as well as to obtain facts from the person him or herself.
• Observations – Observing behaviors, interactions, processes, etc., related to the case as they unfold in real-time.
• Documents & Records – Reviewing private documents, diaries, public records, correspondence, meeting minutes, etc., relevant to the case.

2. Secondary sources

• News/Media – News coverage of events related to the case study.
• Academic articles – Journal articles, dissertations etc. that discuss the case.
• Government reports – Official data and records related to the case context.
• Books/films – Books, documentaries or films discussing the case.

3. Archival records

Searching historical archives, museum collections and databases to find relevant documents, visual/audio records related to the case history and context.

Public archives like newspapers, organizational records, photographic collections could all include potentially relevant pieces of information to shed light on attitudes, cultural perspectives, common practices and historical contexts related to psychology.

4. Organizational records

Organizational records offer the advantage of often having large datasets collected over time that can reveal or confirm psychological insights.

Of course, privacy and ethical concerns regarding confidential data must be navigated carefully.

However, with proper protocols, organizational records can provide invaluable context and empirical depth to qualitative case studies exploring the intersection of psychology and organizations.

• Organizational/industrial psychology research : Organizational records like employee surveys, turnover/retention data, policies, incident reports etc. may provide insight into topics like job satisfaction, workplace culture and dynamics, leadership issues, employee behaviors etc.
• Clinical psychology : Therapists/hospitals may grant access to anonymized medical records to study aspects like assessments, diagnoses, treatment plans etc. This could shed light on clinical practices.
• School psychology : Studies could utilize anonymized student records like test scores, grades, disciplinary issues, and counseling referrals to study child development, learning barriers, effectiveness of support programs, and more.

How do I Write a Case Study in Psychology?

Follow specified case study guidelines provided by a journal or your psychology tutor. General components of clinical case studies include: background, symptoms, assessments, diagnosis, treatment, and outcomes. Interpreting the information means the researcher decides what to include or leave out. A good case study should always clarify which information is the factual description and which is an inference or the researcher’s opinion.

1. Introduction

• Provide background on the case context and why it is of interest, presenting background information like demographics, relevant history, and presenting problem.
• Compare briefly to similar published cases if applicable. Clearly state the focus/importance of the case.

2. Case Presentation

• Describe the presenting problem in detail, including symptoms, duration,and impact on daily life.
• Include client demographics like age and gender, information about social relationships, and mental health history.
• Describe all physical, emotional, and/or sensory symptoms reported by the client.
• Use patient quotes to describe the initial complaint verbatim. Follow with full-sentence summaries of relevant history details gathered, including key components that led to a working diagnosis.
• Summarize clinical exam results, namely orthopedic/neurological tests, imaging, lab tests, etc. Note actual results rather than subjective conclusions. Provide images if clearly reproducible/anonymized.
• Clearly state the working diagnosis or clinical impression before transitioning to management.

3. Management and Outcome

• Indicate the total duration of care and number of treatments given over what timeframe. Use specific names/descriptions for any therapies/interventions applied.
• Present the results of the intervention,including any quantitative or qualitative data collected.
• For outcomes, utilize visual analog scales for pain, medication usage logs, etc., if possible. Include patient self-reports of improvement/worsening of symptoms. Note the reason for discharge/end of care.

4. Discussion

• Analyze the case, exploring contributing factors, limitations of the study, and connections to existing research.
• Analyze the effectiveness of the intervention,considering factors like participant adherence, limitations of the study, and potential alternative explanations for the results.
• Identify any questions raised in the case analysis and relate insights to established theories and current research if applicable. Avoid definitive claims about physiological explanations.
• Offer clinical implications, and suggest future research directions.

5. Additional Items

• Thank specific assistants for writing support only. No patient acknowledgments.
• References should directly support any key claims or quotes included.
• Use tables/figures/images only if substantially informative. Include permissions and legends/explanatory notes.
• Provides detailed (rich qualitative) information.
• Provides insight for further research.
• Permitting investigation of otherwise impractical (or unethical) situations.

Case studies allow a researcher to investigate a topic in far more detail than might be possible if they were trying to deal with a large number of research participants (nomothetic approach) with the aim of ‘averaging’.

Because of their in-depth, multi-sided approach, case studies often shed light on aspects of human thinking and behavior that would be unethical or impractical to study in other ways.

Research that only looks into the measurable aspects of human behavior is not likely to give us insights into the subjective dimension of experience, which is important to psychoanalytic and humanistic psychologists.

Case studies are often used in exploratory research. They can help us generate new ideas (that might be tested by other methods). They are an important way of illustrating theories and can help show how different aspects of a person’s life are related to each other.

The method is, therefore, important for psychologists who adopt a holistic point of view (i.e., humanistic psychologists ).

Limitations

• Lacking scientific rigor and providing little basis for generalization of results to the wider population.
• Researchers’ own subjective feelings may influence the case study (researcher bias).
• Difficult to replicate.
• Time-consuming and expensive.
• The volume of data, together with the time restrictions in place, impacted the depth of analysis that was possible within the available resources.

Because a case study deals with only one person/event/group, we can never be sure if the case study investigated is representative of the wider body of “similar” instances. This means the conclusions drawn from a particular case may not be transferable to other settings.

Because case studies are based on the analysis of qualitative (i.e., descriptive) data , a lot depends on the psychologist’s interpretation of the information she has acquired.

This means that there is a lot of scope for Anna O , and it could be that the subjective opinions of the psychologist intrude in the assessment of what the data means.

For example, Freud has been criticized for producing case studies in which the information was sometimes distorted to fit particular behavioral theories (e.g., Little Hans ).

This is also true of Money’s interpretation of the Bruce/Brenda case study (Diamond, 1997) when he ignored evidence that went against his theory.

Breuer, J., & Freud, S. (1895).  Studies on hysteria . Standard Edition 2: London.

Curtiss, S. (1981). Genie: The case of a modern wild child .

Diamond, M., & Sigmundson, K. (1997). Sex Reassignment at Birth: Long-term Review and Clinical Implications. Archives of Pediatrics & Adolescent Medicine , 151(3), 298-304

Freud, S. (1909a). Analysis of a phobia of a five year old boy. In The Pelican Freud Library (1977), Vol 8, Case Histories 1, pages 169-306

Freud, S. (1909b). Bemerkungen über einen Fall von Zwangsneurose (Der “Rattenmann”). Jb. psychoanal. psychopathol. Forsch ., I, p. 357-421; GW, VII, p. 379-463; Notes upon a case of obsessional neurosis, SE , 10: 151-318.

Harlow J. M. (1848). Passage of an iron rod through the head.  Boston Medical and Surgical Journal, 39 , 389–393.

Harlow, J. M. (1868).  Recovery from the Passage of an Iron Bar through the Head .  Publications of the Massachusetts Medical Society. 2  (3), 327-347.

Money, J., & Ehrhardt, A. A. (1972).  Man & Woman, Boy & Girl : The Differentiation and Dimorphism of Gender Identity from Conception to Maturity. Baltimore, Maryland: Johns Hopkins University Press.

Money, J., & Tucker, P. (1975). Sexual signatures: On being a man or a woman.

Further Information

• Case Study Approach
• Case Study Method
• Enhancing the Quality of Case Studies in Health Services Research
• “We do things together” A case study of “couplehood” in dementia
• Using mixed methods for evaluating an integrative approach to cancer care: a case study

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