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Correcting for Small Group Inflation of Roll-Call Cohesion Scores

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  • DESPOSATO, SCOTT W.

Abstract

Roll-call cohesion scores are the most widely used measures of voting blocs in legislative studies, appearing in literally hundreds of studies since their introduction in 1924. Despite a staple of legislative studies, we know virtually nothing about the statistical properties of these scores. In this article, it is shown how such scores suffer a serious bias problem: scores are artificially inflated for small parties, especially those that are less unified. The problem is demonstrated and an intuitive solution proposed. It is illustrated with data from the United States and from Brazil.

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  • Desposato, Scott W., 2005. "Correcting for Small Group Inflation of Roll-Call Cohesion Scores," British Journal of Political Science, Cambridge University Press, vol. 35(4), pages 731-744, October.
    • Handle: RePEc:cup:bjposi:v:35:y:2005:i:04:p:731-744_00
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    Cited by:

    1. Daniel Finke, 2020. "EU enlargement and foreign policy coordination: more powerful, but less cohesive?," The Review of International Organizations, Springer, vol. 15(1), pages 189-210, January.
    2. Douglas Dion & Frederick J. Boehmke & William MacMillan & Charles R. Shipan, 2016. "The Filibuster as a War of Attrition," Journal of Law and Economics, University of Chicago Press, vol. 59(3), pages 569-595.

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