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Dictatorship versus manipulability

Author

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  • Bednay, Dezső
  • Moskalenko, Anna
  • Tasnádi, Attila

Abstract

The Gibbard-Satterthwaite (1973/75) theorem roughly states that we have to accept dictatorship or manipulability in case of at least three alternatives. A large strand of the literature estimates the degree of manipulability of social choice functions (e.g. Aleskerov and Kurbanov, 1999, Favardin et al., 2002, and Aleskerov et al., 2012), most of them employing the Nitzan-Kelly index of manipulability. We take a different approach and introduce a non-dictatorship index based on our recent work (Bednay et al., 2017), where we have analysed social choice functions based on their distances to the dictatorial rules. By employing computer simulations, we investigate the relationship between the manipulability and nondictatorship indices of some prominent social choice functions, putting them into a common framework.

Suggested Citation

  • Bednay, Dezső & Moskalenko, Anna & Tasnádi, Attila, 2018. "Dictatorship versus manipulability," Corvinus Economics Working Papers (CEWP) 2018/09, Corvinus University of Budapest.
    • Handle: RePEc:cvh:coecwp:2018/09
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    References listed on IDEAS

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    1. Stefan Maus & Hans Peters & Ton Storcken, 2007. "Minimal manipulability: anonymity and unanimity," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 29(2), pages 247-269, September.
    2. Shmuel Nitzan, 1985. "The vulnerability of point-voting schemes to preference variation and strategic manipulation," Public Choice, Springer, vol. 47(2), pages 349-370, January.
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    4. Pierre Favardin & Dominique Lepelley & Jérôme Serais, 2002. "original papers : Borda rule, Copeland method and strategic manipulation," Review of Economic Design, Springer;Society for Economic Design, vol. 7(2), pages 213-228.
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    More about this item

    Keywords

    voting rules; dictatorship; manipulability; manipulability index; dictatorship index;
    All these keywords.

    JEL classification:

    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations

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