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Voting Rules, Manipulability and Social Homogeneity

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  • Lepelley, Dominique
  • Valognes, Fabrice

Abstract

To what extent are some voting rules more vulnerable to strategic manipulation than others? In order to answer this question, representations are developed for the coalitional manipulability of eight voting rules under various assumptions concerning the likelihood that given voters' preference profiles are observed on three alternatives. Of particular interest is the impact that social homogeneity (defined as the tendency of voters' preference to be similar) has on the manipulability of voting rules. The results we obtain show that the hierarchy of the voting rules that results from our computations can crucially depend on the degree of social homogeneity. However, it turns out that, whatever the degree of homogeneity, the Hare method (or two-stage plurality) minimizes susceptibility to strategic manipulation by coalitions of voters in three-candidate elections. Copyright 2003 by Kluwer Academic Publishers

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Bibliographic Info

Article provided by Springer in its journal Public Choice.

Volume (Year): 116 (2003)
Issue (Month): 1-2 (July)
Pages: 165-84

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Handle: RePEc:kap:pubcho:v:116:y:2003:i:1-2:p:165-84

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Web page: http://www.springerlink.com/link.asp?id=100332

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Cited by:
  1. Geoffrey Pritchard & Arkadii Slinko, 2006. "On the Average Minimum Size of a Manipulating Coalition," Social Choice and Welfare, Springer, vol. 27(2), pages 263-277, October.
  2. Yuliya Veselova, 2012. "The difference between manipulability indexes in IC and IANC models," HSE Working papers WP BRP 17/EC/2012, National Research University Higher School of Economics.
  3. Mostapha Diss, 2013. "Strategic manipulability of self-selective social choice rules," Working Papers 1302, Groupe d'Analyse et de Théorie Economique (GATE), Centre national de la recherche scientifique (CNRS), Université Lyon 2, Ecole Normale Supérieure.
  4. Aki Lehtinen, 2007. "The Borda rule is also intended for dishonest men," Public Choice, Springer, vol. 133(1), pages 73-90, October.
  5. Pierre Favardin & Dominique Lepelley, 2006. "Some Further Results on the Manipulability of Social Choice Rules," Social Choice and Welfare, Springer, vol. 26(3), pages 485-509, June.
  6. Mostapha Diss, 2013. "Strategic manipulability of self-­selective social choice rules," Working Papers halshs-00785366, HAL.
  7. Eyal Baharad & Zvika Neeman, 2007. "Robustness against inefficient manipulation," Social Choice and Welfare, Springer, vol. 29(1), pages 55-67, July.

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