Statistics for Lawyers presents the science of statistics in action at the cutting edge of legal problems. A series of more than 90 case studies, drawn principally from actual litigation, have been selected to illustrate important areas of the law in which statistics has played a role and to demonstrate a variety of statistical tools. Some case studies raise legal issues that are being intensely debated and lie at the edge of the law. Of particular note are problems involving toxic torts, employment discrimination, stock market manipulation, paternity, tax legislation, and drug testing. The case studies are presented in the form of legal/statistical puzzles to challenge the reader and focus discussion on the legal implications of statistical findings. The techniques range from simple averaging for the estimation of thefts from parking meters to complex logistic regression models for the demonstration of discrimination in the death penalty. Excerpts of data allow the reader to compute statistical results and an appendix contains the authors' calculations.

When as a practicing lawyer I published my ?rst article on statistical evidence in 1966, the editors of the Harvard Law Review told me that a mathematical equa- 1 tion had never before appeared in the review. This hardly seems possible - but if they meant a serious mathematical equation, perhaps they were right. Today all that has changed in legal academia. Whole journals are devoted to scienti?c methods in law or empirical studies of legal institutions. Much of this work involves statistics. Columbia Law School, where I teach, has a professor of law and epidemiology and other law schools have similar “law and” professorships. Many offer courses on statistics (I teach one) or, more broadly, on law and social science. The same is true of practice. Where there are data to parse in a litigation, stat- ticians and other experts using statistical tools now frequently testify. And judges must understand them. In 1993, in its landmark Daubert decision, the Supreme Court commanded federal judges to penetrate scienti?c evidence and ?nd it “re- 2 liable” before allowing it in evidence. It is emblematic of the rise of statistics in the law that the evidence at issue in that much-cited case included a series of epidemiological studies. The Supreme Court’s new requirement made the Federal Judicial Center’s Reference Manual on Scienti?c Evidence, which appeared at about the same time, a best seller. It has several important chapters on statistics.

Statistics for Lawyers' is designated to introduce law students, law teachers, practitioners, and judges to the basic ideas of mathematical probability and statistics as they as they have been applied in the law.

When as a practicing lawyer I published my ?rst article on statistical evidence in 1966, the editors of the Harvard Law Review told me that a mathematical equa- 1 tion had never before appeared in the review. This hardly seems possible - but if they meant a serious mathematical equation, perhaps they were right. Today all that has changed in legal academia. Whole journals are devoted to scienti?c methods in law or empirical studies of legal institutions. Much of this work involves statistics. Columbia Law School, where I teach, has a professor of law and epidemiology and other law schools have similar “law and” professorships. Many offer courses on statistics (I teach one) or, more broadly, on law and social science. The same is true of practice. Where there are data to parse in a litigation, stat- ticians and other experts using statistical tools now frequently testify. And judges must understand them. In 1993, in its landmark Daubert decision, the Supreme Court commanded federal judges to penetrate scienti?c evidence and ?nd it “re- 2 liable” before allowing it in evidence. It is emblematic of the rise of statistics in the law that the evidence at issue in that much-cited case included a series of epidemiological studies. The Supreme Court’s new requirement made the Federal Judicial Center’s Reference Manual on Scienti?c Evidence, which appeared at about the same time, a best seller. It has several important chapters on statistics.

This law school casebook was developed by a team of professors at Harvard Law School to introduce students with little or no quantitative background to the basic analytical techniques that attorneys need to master to represent their clients effectively. This casebook presents clear explanations of decision analysis, games and information, contracting, accounting, finance, microeconomics, economic analysis of the law, fundamentals of statistics, and multiple regression analysis. References and examples have been thoroughly updated for this 2d edition, and exposition of a number of key topics has been reworked to reflect insights gained from teaching these topics using the 1st edition to many hundreds of Harvard Law students over the past decade.

A noble profession is facing its defining moment. From law schools to the prestigious firms that represent the pinnacle of a legal career, a crisis is unfolding. News headlines tell part of the story—the growing oversupply of new lawyers, widespread career dissatisfaction, and spectacular implosions of pre-eminent law firms. Yet eager hordes of bright young people continue to step over each other as they seek jobs with high rates of depression, life-consuming hours, and little assurance of financial stability. The Great Recession has only worsened these trends, but correction is possible and, now, imperative. In The Lawyer Bubble, Steven J. Harper reveals how a culture of short-term thinking has blinded some of the nation’s finest minds to the long-run implications of their actions. Law school deans have ceded independent judgment to flawed U.S. News & World Report rankings criteria in the quest to maximize immediate results. Senior partners in the nation’s large law firms have focused on current profits to enhance American Lawyer rankings and individual wealth at great cost to their institutions. Yet, wiser decisions—being honest about the legal job market, revisiting the financial incentives currently driving bad behavior, eliminating the billable hour model, and more—can take the profession to a better place. A devastating indictment of the greed, shortsightedness, and dishonesty that now permeate the legal profession, this insider account is essential reading for anyone who wants to know how things went so wrong and how the profession can right itself once again.