Abstract

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The Most Dangerous Justice Rides Again: Revisiting the Power Pageant of the Justices


Paul H. Edelman


Vanderbilt University - Law School

James Ming Chen


Michigan State University - College of Law


Minnesota Law Review, Vol. 86, p. 131, 2001
Vanderbilt Law and Economics Research Paper No. 01-08
Vanderbilt Public Law Research Paper No. 01-05
Minnesota Legal Studies Research Paper No. 02-4

Abstract:     
Who is the most powerful Supreme Court Justice? In 1996 we measured voting power on the Court according to each Justice's ability to form five-member coalitions. From the set of all coalitions formed by the Court during its 1994 and 1995 Terms, we developed a generalized Banzhaf index of the Justices' relative strength. Generally speaking, participating in a greater number of unique coalitions translates into greater judicial voting power. To supplement the small number of decisions then available, we derived hypothetical five-Justice coalitions from the intersections of actually observed coalitions involving more than five members. Professor Lynn Baker contested our model, favoring instead an additive measure based on the number of times each Justice participated in any winning coalition.

This Article stages a new Power Pageant of the Justices in light of the cases decided by the Court since 1996. For more than seven Terms, the Court has retained the same personnel. This stability provides a unique opportunity to test competing measures of judicial voting power. We hypothesized in 1996 that a larger set of cases might obviate the need to resort to inferred coalitions. Analysis of this larger data set in fact undermines the validity of both our measure and that of Professor Baker over the long run. We conclude that there are three different measures of voting power each reflecting a different aspect of judicial power.

Number of Pages in PDF File: 62

Keywords: Banzhaf index, voting power, Supreme Court, Anthony Kennedy

JEL Classification: C78, D72

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Date posted: July 16, 2001  

Suggested Citation

Edelman, Paul H. and Chen, James Ming, The Most Dangerous Justice Rides Again: Revisiting the Power Pageant of the Justices. Minnesota Law Review, Vol. 86, p. 131, 2001; Vanderbilt Law and Economics Research Paper No. 01-08; Vanderbilt Public Law Research Paper No. 01-05; Minnesota Legal Studies Research Paper No. 02-4. Available at SSRN: http://ssrn.com/abstract=276370 or http://dx.doi.org/10.2139/ssrn.276370

Contact Information

Paul H. Edelman (Contact Author)
Vanderbilt University - Law School ( email )
131 21st Avenue South
Nashville, TN 37203-1181
United States
615-322-0990 (Phone)
615-322-6631 (Fax)
James Ming Chen
Michigan State University - College of Law ( email )
318 Law College Building
East Lansing, MI 48824-1300
United States
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