Securities Law Commons^™

To Remove Or Not To Remove - Is That The Question In 1933 Act Securities Cases?, Tanya Pierce

Faculty Scholarship

Litigants spend immense time and money fighting over procedure. That fact is especially true for procedural rules concerning where a case may be heard—which, in the context of class actions, can determine the viability of claims almost regardless of their underlying merit. The potential for class certification, which tends to be greater in state than in federal courts, can transform claims that alone are too small to even justify suing into threats so large that defendants routinely use the words “judicial blackmail” to describe them. This paper focuses on a growing conflict between federal statutory removal provisions that arises in …

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 …