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Voting Power and Voting Blocs

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  • Leech, Dennis
  • Leech, Robert

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.

Suggested Citation

  • Leech, Dennis & Leech, Robert, 2004. "Voting Power and Voting Blocs," Economic Research Papers 269610, University of Warwick - Department of Economics.
    • Handle: RePEc:ags:uwarer:269610
    DOI: 10.22004/ag.econ.269610
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    References listed on IDEAS

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    1. James Coleman, 1970. "The benefits of coalition," Public Choice, Springer, vol. 8(1), pages 45-61, March.
    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.
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    Cited by:

    1. Masili, Gustavo, 2013. "O Poder das Alianças no Congresso Nacional Brasileiro: Votação de Vetos Presidenciais e de Emendas Constitucionais [The Power of Alliances in the Brazilian National Congress: Vote on Presidential V," MPRA Paper 52170, University Library of Munich, Germany.

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