Open Access. Powered by Scholars. Published by Universities.®
Social and Behavioral Sciences Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Social and Behavioral Sciences
Single-Firm Event Studies, Securities Fraud, And Financial Crisis: Problems Of Inference, Andrew Baker
Single-Firm Event Studies, Securities Fraud, And Financial Crisis: Problems Of Inference, Andrew Baker
Andrew Baker
Lawsuits brought pursuant to section 10(b) of the Securities and Exchange Actdepend on the reliability of a statistical tool called an event study to adjudicate issues ofreliance, materiality, loss causation, and damages. Although judicial acceptance of theevent study technique is pervasive, there has been little empirical analysis of the ability ofevent studies to produce reliable results when applied to a single company’s security.
Using data from the recent financial crisis, this Note demonstrates that the standardmodelevent study used in most court proceedings can lead to biased inferences sanctionedthrough the Daubert standard of admissibility for expert testimony. In particular, in thepresence …
Quantile Regression With Nonadditive Fixed Effects, David Powell
Quantile Regression With Nonadditive Fixed Effects, David Powell
David Powell
This paper introduces a quantile regression estimator for panel data (QRPD) with nonadditive fixed effects, maintaining the nonseparable disturbance term commonly associated with quantile estimation. QRPD estimates the impact of exogenous or endogenous treatment variables on the outcome distribution using ``within" variation in the treatment variables or instruments for identification purposes. Most quantile panel data estimators include additive fixed effects which separates the disturbance term and assumes the parameters vary based only on the time-varying components of the disturbance term. QRPD is consistent for small T and straightforward to implement. The nonadditive fixed effects are never estimated or even specified. …