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University of Pennsylvania Carey Law School

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Preemption In The Rehnquist And Roberts Courts: An Empirical Analysis, Michael Greve, Jonathan Klick, Michael A. Petrino, J. P. Sevilla Jan 2016

Preemption In The Rehnquist And Roberts Courts: An Empirical Analysis, Michael Greve, Jonathan Klick, Michael A. Petrino, J. P. Sevilla

All Faculty Scholarship

This article presents an empirical analysis of the Rehnquist Court’s and the Roberts Court’s decisions on the federal (statutory) preemption of state law. In addition to raw outcomes for or against preemption, we examine cases by subject-matter, level of judicial consensus, tort versus regulatory preemption, party constellation, and origin in state or federal court. We present additional data and analysis on the role of state amici and of the U.S. Solicitor General in preemption cases, and we examine individual justices’ voting records. Among our findings, one stands out: over time and especially under the Roberts Court, lawyerly preemption questions have …


Does Anyone Get Stopped At The Gate? An Empirical Assessment Of The Daubert Trilogy In The States, Eric Helland, Jonathan Klick Mar 2009

Does Anyone Get Stopped At The Gate? An Empirical Assessment Of The Daubert Trilogy In The States, Eric Helland, Jonathan Klick

All Faculty Scholarship

The Supreme Court’s trilogy of evidence cases, Daubert, Joiner, and Kumho Tire appear to mark a significant departure in the way scientific and expert evidence is handled in federal court. By focusing on the underlying methods used to generate the experts’ conclusions, Daubert has the potential to impose a more rigorous standard on experts. Given this potential, some individuals have called for states to adopt the Daubert standards to purge “junk science” from state courts. However, there is relatively little empirical support for the notion that Daubert affects the quality of expert evidence. Using a large dataset of state court …