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The Unanimous Decisions of the Supreme Court of Canada as a Test of the Attitudinal Model

Published online by Cambridge University Press:  07 April 2009

Donald R. Songer  and
Julia Siripurapu
Donald R. Songer*
Affiliation:
University of South Carolina
Julia Siripurapu*
Affiliation:
Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, PC
*
Donald R. Songer, Department of Political Science, University of South Carolina, Columbia, SC 29208, dsonger@sc.edu.
Julia Siripurapu, Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, PC, Boston, MA, jsiripurapu@mintz.com.
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Abstract

Abstract. Most of the empirical work on the decision making of justices on the Supreme Court of Canada has taken as its exclusive focus the divided decisions of the Court. In contrast to this extensive body of research on divided decision, the much more limited knowledge of unanimous decisions is troubling because such decisions constitute nearly three-quarters of all of the formal decisions of the Court. The analysis reported below provides a first step towards understanding the neglected nature of unanimous decisions. This investigation of the nature and causes of unanimity in the Supreme Court of Canada explores two competing explanations: one drawn from the most widely accepted general explanation of judicial voting (that is, the attitudinal model) and the other from the perspectives of the justices themselves. To determine that perspective, the author interviewed ten of the current or recent justices on the Court. After describing these two alternative accounts of unanimity, empirical tests are conducted of the implications of each view. We find substantially more support for the perspectives of the justices than for the perspective derived from the attitudinal model on unanimity.

Résumé. La majeure partie du travail de recherche empirique portant sur la manière dont les juges de la Cour suprême du Canada prennent leurs décisions se concentre exclusivement sur les décisions divisées de cette institution. En contraste avec cette foison d'études sur les décisions divisées, le corpus beaucoup plus limité de connaissances sur les décisions unanimes pose un problème important, car celles-ci représentent presque les trois quarts de la totalité des décisions formelles de la Cour suprême. L'analyse présentée ci-dessous se veut un premier pas vers une meilleure connaissance de la nature, trop négligée jusqu'à présent, de ces décisions unanimes. Cette investigation sur la nature et les causes de l'unanimité dans les décisions de la Cour suprême du Canada explore deux voies se trouvant en compétition : l'une qui résulte de l'explication la plus largement acceptée du vote judiciaire (soit le modèle attitudinal), et l'autre qui découle de la perspective personnelle des juges. Pour élucider cette perspective propre des juges, les auteurs ont interviewé dix juges actuels et récents de la Cour suprême du Canada. Après avoir décrit ces deux explications alternatives de l'unanimité, ils effectuent des tests empiriques sur les implications respectives du modèle attitudinal et des perspectives propres des juges. L'étude révèle que les perspectives propres des juges ont beaucoup plus de poids que la perspective dérivée du modèle attitudinal en ce qui concerne l'unanimité.

Type
Research Article
Information
Canadian Journal of Political Science/Revue canadienne de science politique , Volume 42 , Issue 1 , March 2009 , pp. 65 - 92
Copyright
Copyright © Canadian Political Science Association 2009

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