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Nash rationalizability of collective choice over lotteries

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  • T. DEMUYNCK
  • L. LAUWERS

Abstract

To test the joint hypothesis that players in a noncooperative game (allowing mixed strategies) maximize expected utilities and select a Nash equilibrium, it suffices to study the reaction of the revealed collective choice upon changes in the space of strategies available to the players. The joint hypothesis is supported if the revealed choices satisfy an extended version of Richter’s congruence axiom together with a contraction-expansion axiom that models the noncooperative behavior. In addition, we provide sufficient and necessary conditions for a binary relation to have an independent ordering extension, and for individual choices over lotteries to be rationalizable.

Suggested Citation

  • T. Demuynck & L. Lauwers, 2005. "Nash rationalizability of collective choice over lotteries," Working Papers of Faculty of Economics and Business Administration, Ghent University, Belgium 05/301, Ghent University, Faculty of Economics and Business Administration.
    • Handle: RePEc:rug:rugwps:05/301
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    File URL: http://wps-feb.ugent.be/Papers/wp_05_301.pdf
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    References listed on IDEAS

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    3. Amartya K. Sen, 1971. "Choice Functions and Revealed Preference," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 38(3), pages 307-317.
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    More about this item

    Keywords

    independence condition; binary extensions; rationalizability; Nash equilibrium in mixed strategies;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior

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