Taking the Measure of Ideology: Empirically Measuring Supreme Court Cases
Northwestern University - Pritzker School of Law
Loyola University Chicago School of Law
April 9, 2009
Georgetown Law Journal, Forthcoming
Empirical legal studies have become increasingly popular and influential, but empirical analysis is only as good as its tools. Until recently, no sophisticated measure of case outcomes existed. Jacobi (2009) developed three possible measures of case outcomes, based on three common theories of how Justices balance the trade-off between outcome optimization and coalition maximization. This Article extends Jacobi's earlier theoretical work by empirically testing those competing measures of case outcomes.
The competing measures are initially assessed against a dataset of over 8000 Supreme Court cases decided between 1953 and 2006. The measures are also assessed in a more targeted fashion in relation to Supreme Court intellectual property cases spanning the same period. The large-n data enables us to make statistically robust assessments, whereas the small-n data facilitates alternative measurement strategies and coherent doctrinal analysis. We find a viable measure of case outcomes exists that is reliable and valid. As well as suggesting the best means of scoring case outcomes, our results enhance scholars' understandings of Supreme Court jurisprudence and inform the debate over how courts decide cases.
Number of Pages in PDF File: 86
Keywords: Judicial behavior, Empirical legal studies, Measurement, Ideology, Collegiality, Strategic behavior, Intellectual property, Supreme Court
JEL Classification: K00, K10
Date posted: February 19, 2009 ; Last revised: May 24, 2012
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