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Measuring Foreign Policy Positions of Members of the US Congress*
Published online by Cambridge University Press: 28 January 2016
Abstract
Studies have shown that a foreign policy position of a member of Congress is often distinct from a domestic one. Despite this, measures commonly used to determine the foreign policy positions of members of Congress are based on congressional votes on domestic as well as foreign policy matters. As foreign policy votes take up only a small portion of all congressional votes, these measures conflate a member’s foreign policy position with his or her domestic policy position. While there are other measures based exclusively on foreign policy votes, these are also problematic because they tend to use a small number of controversial votes and thus inflate extremism. To address these shortcomings, I present a new measure by applying a Bayesian item response theory model to all foreign policy votes. This paper demonstrates the similarities, differences, and advantages of this measure by comparing it with the existing measures in a series of analyses of foreign policy positions of political parties and individual legislators.
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- © The European Political Science Association 2016
Footnotes
Gyung-Ho Jeong, Assistant Professor at the University of British Columbia, C425 - 1866 Main Mall, Vancouver, B.C. V6T 1Z1, Canada ([email protected]). An earlier version of this paper was presented at the 2013 Annual Meeting of the Midwest Political Science Association. The author would like to thank Ralph Carter, James McCormick, and three anonymous reviewers for their comments. This research was supported by the Social Sciences and Humanities Research Council of Canada. To view supplementary material for this article, please visit http://dx.doi.org/10.1017/psrm.2016.3
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