Law Commons^™

Power And Statistical Significance In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach

All Faculty Scholarship

Event studies, a half-century-old approach to measuring the effect of events on stock prices, are now ubiquitous in securities fraud litigation. In determining whether the event study demonstrates a price effect, expert witnesses typically base their conclusion on whether the results are statistically significant at the 95% confidence level, a threshold that is drawn from the academic literature. As a positive matter, this represents a disconnect with legal standards of proof. As a normative matter, it may reduce enforcement of fraud claims because litigation event studies typically involve quite low statistical power even for large-scale frauds.

This paper, written for …

Controlling The Jury-Teaching Function, Richard D. Friedman

Articles

When evidence with a scientific basis is offered, two fundamental questions arise. First, should it be admitted? Second, if so, how should it be assessed? There are numerous participants who might play a role in deciding these questions—the jury (on the second question only), the parties (through counsel), expert witnesses on each side, the trial court, the forces controlling the judicial system (which include, but are not limited to, the appellate courts), and the scientific establishment. In this Article, I will suggest that together, the last two—the forces controlling the judicial system and the scientific establishment—have a large role to …

Prisoners' Rights Lawyers' Strategies For Preserving The Role Of The Courts, Margo Schlanger

Articles

This Article is part of the University of Miami Law Review’s Leading from Below Symposium. It canvasses prisoners’ lawyers’ strategies prompted by the 1996 Prison Litigation Reform Act (“PLRA”). The strategies comply with the statute’s limits yet also allow U.S. district courts to remain a forum for the vindication of the constitutional rights of at least some of the nation’s millions of prisoners. After Part I’s introduction, Part II summarizes in several charts the PLRA’s sharp impact on the prevalence and outcomes of prison litigation, but demonstrates that there are still many cases and situations in which courts continue to …

Trends In Prisoner Litigation, As The Plra Enters Adulthood, Margo Schlanger

Articles

The Prison Litigation Reform Act (PLRA), enacted in 1996 as part of the Newt Gingrich "Contract with America," is now as old as some prisoners. In the year after the statute's passage, some commenters labeled it merely "symbolic." In fact, as was evident nearly immediately, the PLRA undermined prisoners' ability to bring, settle, and win lawsuits. The PLRA conditioned court access on prisoners' meticulously correct prior use of onerous and error-inviting prison grievance procedures. It increased filing fees, decreased attorneys' fees, and limited damages. It subjected injunctive settlements to the scope limitations usually applicable only to litigated injunctions. It made …

Machine Learning And Law, Harry Surden

Publications

This Article explores the application of machine learning techniques within the practice of law. Broadly speaking “machine learning” refers to computer algorithms that have the ability to “learn” or improve in performance over time on some task. In general, machine learning algorithms are designed to detect patterns in data and then apply these patterns going forward to new data in order to automate particular tasks. Outside of law, machine learning techniques have been successfully applied to automate tasks that were once thought to necessitate human intelligence — for example language translation, fraud-detection, driving automobiles, facial recognition, and data-mining. If performing …

Docketology, District Courts And Doctrine, David A. Hoffman, Alan J. Izenman, Jeffrey Lidicker

All Faculty Scholarship

Empirical legal scholars have traditionally modeled trial court judicial opinion writing by assuming that judges act rationally, seeking to maximize their influence by writing opinions in politically important cases. Support for this hypothesis has reviewed published trial court opinions, finding that civil rights and other "hot" topics are more likely to be explained than purportedly ordinary legal problems involved in resolving social security and commercial law cases. This orthodoxy comforts consumers of legal opinions, because it suggests that they are largely representative of judicial work. To test such views, we collected data from a thousand cases in four different jurisdictions. …

What We Know, And What We Should Know About American Trial Trends, Margo Schlanger

Articles

More than a few people noticed that the American court system was seeing ever fewer trials before Marc Galanter named the phenomenon.' But until Galanter mobilized lawyers2 and scholars to look systematically at the issue, inquiry was both piecemeal and sparse. Over the past three years, in contrast, Galanter's research 3 and his idea entrepreneurship, crystallized in the "Vanishing Trial" label, has spawned if not a huge literature at least a substantial one. We have now gotten the benefit of sustained scholarly inquiry by researchers of many stripes. Their work has been largely, though not entirely, empirical, and so we …

Statistics In Litigation: A Selective Bibliography, Michael G. Chiorazzi

Articles

No abstract provided.

Book Review, Elaine W. Shoben

Scholarly Works

Quantitative Methods in Law represents the efforts of one legal scholar to apply mathematical probability and statistics to the solution of a wide range of legal problems. Michael O. Finkelstein has republished in book form a collection of his articles, beginning with his most famous and most widely cited: the application of mathematical probability to jury discrimination cases. After leading the reader through a series of fascinating applications of statistical problem solving to an impressively wide range of legal situations, the book concludes with the final words of one of the most engaging battles among legal scholars in recent years: …