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Voting Power and Voting Blocs

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Author Info
Leech, Dennis (Warwick University)
Leech, Robert (Birkbeck, London University)

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Abstract

We investigate the applicability of voting power indices, in particular the Penrose index (aka absolute Banzhaf index), in the analysis of voting blocs by means of a hypothetical voting body. We use the power of individual bloc members to study the implications of the formation of blocs and how voting power varies as bloc size varies. This technique of analysis has many real world applications to legislatures and international bodies. It can be generalised in many ways : the analysis is a priori (assuming formal voting and ignoring actual voting behaviour) but can be made empirical with voting data ; it examines the consequences of two blocs but can easily be extended to more.

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File URL: http://www2.warwick.ac.uk/fac/soc/economics/research/workingpapers/publications/twerp716b.pdf
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Paper provided by University of Warwick, Department of Economics in its series The Warwick Economics Research Paper Series (TWERPS) with number 716.

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Length: 23 pages
Date of creation: 2004
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Handle: RePEc:wrk:warwec:716

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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Leech, Dennis & Leech, Robert, 2004. "Voting Power in the Bretton Woods Institutions," The Warwick Economics Research Paper Series (TWERPS) 718, University of Warwick, Department of Economics. [Downloadable!]
  2. Straffin, Philip Jr., 1994. "Power and stability in politics," Handbook of Game Theory with Economic Applications, in: R.J. Aumann & S. Hart (ed.), Handbook of Game Theory with Economic Applications, edition 1, volume 2, chapter 32, pages 1127-1151 Elsevier. [Downloadable!] (restricted)
  3. Dennis Leech, 2002. "An Empirical Comparison of the Performance of Classical Power Indices," Political Studies, Political Studies Association, vol. 50(1), pages 1-22, 03. [Downloadable!] (restricted)
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  1. Serguei Kaniovski, 2008. "The exact bias of the Banzhaf measure of power when votes are neither equiprobable nor independent," Social Choice and Welfare, Springer, vol. 31(2), pages 281-300, August. [Downloadable!] (restricted)
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This page was last updated on 2009-11-25.

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