Monday, April 19, 2010

Stras and Spriggs Examine Plurality Decisions

Professor David R. Stras (University of Minnesota Law School) and Professor James F. Spriggs II (Washington University, St. Louis, Department of Political Science) posted "Examining Plurality Decisions" on SSRN. It will be published in the Georgetown Law Journal. 

The abstract states:

Many of the Supreme Court’s most important decisions, such as those involving executive power and the constitutionality of abortion regulations, are decided by plurality decision. Plurality opinions result when five or more Justices agree on the result in a particular case but no single rationale or opinion garners five votes. Many Justices, including William Rehnquist and Ruth Bader Ginsburg, have addressed the problems created by plurality opinions, such as interpretive difficulties in determining the Court’s holding, but few scholars have addressed plurality decisions other than in passing.

In the first empirical analysis examining the occurrence of plurality decisions, the authors examine a variety of ideological, collegial, contextual, and legal factors to determine which factors are most likely to lead to plurality decisions. Drawing on data for every Supreme Court case decided between the 1953 and 2006 Terms of the Supreme Court, the results of the study are illuminating. For example, a case is more likely to result in a plurality decision if it involves an issue of constitutional interpretation with respect to a civil liberties issue and lower court conflict did not influence the decision to grant certiorari.

In addition, the authors estimate an individual Justice model that measures which factors are most likely to lead to votes by Justices to concur in the judgment, which is the key ingredient for a plurality opinion. A Justice’s distance from the majority (or plurality) opinion author and prior lack of cooperation with the opinion author, both play a large role in whether a Justice joins the majority and separately concurs or votes to concur in the judgment. Many of the same factors found influential in the case level model are also found to influence Justices’ decisions to concur in the judgment. Given the importance of plurality decisions to understanding the Supreme Court, this Article provides the basis for further normative evaluations of whether plurality decisions harm the development of the law and how such decisions should be interpreted by lower courts.


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