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Power And Statistical Significance In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach
Power And Statistical Significance In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach
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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 …
Exporting American Discovery, Yanbai Andrea Wang
Exporting American Discovery, Yanbai Andrea Wang
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This Article presents the first comprehensive study of an intriguing and increasingly pervasive practice that is transforming civil litigation worldwide: US judges now routinely compel discovery in this country and make it available for disputes and parties not before US courts. In the past decade and a half, federal courts have received and granted thousands of such discovery requests for use in foreign civil proceedings governed by different procedural rules. I call this global role played by US courts the “export” of American discovery.
This Article compiles and analyzes a dataset of over three thousand foreign discovery requests filed between …
The Logic And Limits Of Event Studies In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach, Jonathan Klick
The Logic And Limits Of Event Studies In Securities Fraud Litigation, Jill E. Fisch, Jonah B. Gelbach, Jonathan Klick
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Event studies have become increasingly important in securities fraud litigation after the Supreme Court’s decision in Halliburton II. Litigants have used event study methodology, which empirically analyzes the relationship between the disclosure of corporate information and the issuer’s stock price, to provide evidence in the evaluation of key elements of federal securities fraud, including materiality, reliance, causation, and damages. As the use of event studies grows and they increasingly serve a gatekeeping function in determining whether litigation will proceed beyond a preliminary stage, it will be critical for courts to use them correctly.
This Article explores an array of …
Actions Speak Louder Than Images: The Use Of Neuroscientific Evidence In Criminal Cases, Stephen J. Morse
Actions Speak Louder Than Images: The Use Of Neuroscientific Evidence In Criminal Cases, Stephen J. Morse
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This invited commentary for Journal of Law & the Biosciences considers four empirical studies previously published in the journal of the reception of neuroscientific evidence in criminal cases in the United States, Canada, England and Wales, and the Netherlands. There are conceded methodological problems with all, but the data are nonetheless instructive and suggestive. The thesis of the comment is that the courts are committing the same errors that have bedeviled the reception of psychiatric and psychological evidence. There is insufficient caution about the state of the science, and more importantly, there is insufficient understanding of the relevance of the …
Procedure And Pragmatism, Stephen B. Burbank
Procedure And Pragmatism, Stephen B. Burbank
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In this essay, prepared as part of a festschrift for the Italian scholar, Michele Taruffo, I portray him as a pragmatic realist of the sort described by Richard Posner in his book, Reflections on Judging. Viewing him as such, I salute Taruffo for challenging the established order in domestic and comparative law thinking about civil law systems, the role of lawyers, courts and precedent in those systems, and also for casting the light of the comparative enterprise on common law systems, particularly that in the United States. Speaking as one iconoclast of another, however, I also raise questions about Taruffo’s …
Using The Dna Testing Of Arrestees To Reevaluate Fourth Amendment Doctrine, Steven P. Grossman
Using The Dna Testing Of Arrestees To Reevaluate Fourth Amendment Doctrine, Steven P. Grossman
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With the advent of DNA testing, numerous issues have arisen with regard to obtaining and using evidence developed from such testing. As courts have come to regard DNA testing as a reliable method for linking some people to crimes and for exonerating others, these issues are especially significant. The federal government and most states have enacted statutes that permit or direct the testing of those convicted of at least certain crimes. Courts have almost universally approved such testing, rejecting arguments that obtaining and using such evidence violates the Fourth Amendment.
More recently governments have enacted laws permitting or directing the …
Catalogs, Gideon Parchomovsky, Alex Stein
Catalogs, Gideon Parchomovsky, Alex Stein
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It is a virtual axiom in the world of law that legal norms come in two prototypes: rules and standards. The accepted lore suggests that rules should be formulated to regulate recurrent and frequent behaviors, whose contours can be defined with sufficient precision. Standards, by contrast, should be employed to address complex, variegated, behaviors that require the weighing of multiple variables. Rules rely on an ex ante perspective and are therefore considered the domain of the legislator; standards embody a preference for ex post, ad-hoc, analysis and are therefore considered the domain of courts. The rules/standards dichotomy has become a …
"Sweet Childish Days": Using Developmental Psychology Research In Evaluating The Admissibility Of Out-Of-Court Statements By Young Children, Lynn Mclain
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A three-year-old child, while being bathed by her babysitter, innocently mentions that her “pee-pee” hurts. When the babysitter asks the child how she hurt it, she says, “Uncle Ernie (her mother’s boyfriend) told me not to tell.” A subsequent medical examination reveals that the child has gonorrhea, a sexually transmitted disease.
By the time of trial, the child is four and-a-half-years old. When questioned by the trial judge, she cannot explain to the judge’s satisfaction, “the difference between the truth and a lie.” Moreover, she has no long term memory of the incident. The judge rules the child incompetent to …