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Commitee decisions: optimality and equilibrium

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Author Info
Laslier, Jean-François () (École Polytechnique)
Weibull, Jörgen () (Dept. of Economics, Stockholm School of Economics)

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Abstract

We consider a committee facing a binary decision under uncertainty. Each member holds some private information. Members may have different preferences and initial beliefs, but they all agree which decision should be taken in each of the two states of the world. We characterize the optimal anonymous and deterministic voting rule and provide a homogeneity assumption on preferences and beliefs under which sincere voting is a Nash equilibrium for this rule. We also provide a necessary and sufficient condition for sincere voting to be an equilibrium under any deterministic majoritarian voting rule. We show that a class of slightly randomized majoritarian voting rules make sincere voting a strict and unique pure-strategy equilibrium. A slight deontological preference for sincere voting, or ex post revelation of individual votes – ”transparency” – combined with a concern for esteem, has the same effect.

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Publisher Info
Paper provided by Stockholm School of Economics in its series Working Paper Series in Economics and Finance with number 692.

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Length: 49 pages
Date of creation: 28 Jan 2008
Date of revision: 11 Mar 2008
Handle: RePEc:hhs:hastef:0692

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Related research
Keywords: voting; condorcet; committee; jury; judgement aggregation.;

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Find related papers by JEL classification:
D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Models of Political Processes: Rent-seeking, Elections, Legislatures, and Voting Behavior

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References listed on IDEAS
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. Ruth Ben-Yashar & Igal Milchtaich, 2007. "First and second best voting rules in committees," Social Choice and Welfare, Springer, vol. 29(3), pages 453-486, October. [Downloadable!] (restricted)
  2. Wit, Jorgen, 1998. "Rational Choice and the Condorcet Jury Theorem," Games and Economic Behavior, Elsevier, vol. 22(2), pages 364-376, February. [Downloadable!] (restricted)
  3. Myerson, Roger B., 1998. "Extended Poisson Games and the Condorcet Jury Theorem," Games and Economic Behavior, Elsevier, vol. 25(1), pages 111-131, October. [Downloadable!] (restricted)
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  4. Bauke Visser & Otto H Swank, 2007. "On Committees of Experts," The Quarterly Journal of Economics, MIT Press, vol. 122(1), pages 337-372, 02. [Downloadable!] (restricted)
  5. Eliaz, Kfir, 2002. "Fault Tolerant Implementation," Review of Economic Studies, Blackwell Publishing, vol. 69(3), pages 589-610, July.
    Other versions:
  6. Al-Najjar, Nabil I. & Smorodinsky, Rann, 2000. "Pivotal Players and the Characterization of Influence," Journal of Economic Theory, Elsevier, vol. 92(2), pages 318-342, June. [Downloadable!] (restricted)
  7. Feddersen, Timothy J & Pesendorfer, Wolfgang, 1996. "The Swing Voter's Curse," American Economic Review, American Economic Association, vol. 86(3), pages 408-24, June.
    Other versions:
    • Timothy J. Feddersen & Wolfgang Pesendorfer, 1995. "The Swing Voter's Curse," Discussion Papers 1064, Northwestern University, Center for Mathematical Studies in Economics and Management Science. [Downloadable!]
  8. Gerardi, Dino & Yariv, Leeat, 2007. "Deliberative voting," Journal of Economic Theory, Elsevier, vol. 134(1), pages 317-338, May. [Downloadable!] (restricted)
  9. Nicola Persico, 2004. "Committee Design with Endogenous Information," Review of Economic Studies, Blackwell Publishing, vol. 71(1), pages 165-191, 01. [Downloadable!] (restricted)
  10. Hahn, Volker, 2008. "Committees, sequential voting and transparency," Mathematical Social Sciences, Elsevier, vol. 56(3), pages 366-385, November. [Downloadable!] (restricted)
  11. Sah, Raaj Kumar & Stiglitz, Joseph E, 1988. "Committees, Hierarchies and Polyarchies," Economic Journal, Royal Economic Society, vol. 98(391), pages 451-70, June. [Downloadable!] (restricted)
  12. Dixit, Avinash & Weibull, Jörgen, 2006. "Political Polarization," Working Paper Series in Economics and Finance 655, Stockholm School of Economics, revised 12 Apr 2007. [Downloadable!]
Full references

Cited by:
(explanations, 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. Bezalel Peleg & Shmuel Zamir, 2008. "Condorcet Jury Theorem: The Dependent Case," Levine's Working Paper Archive 122247000000002422, David K. Levine. [Downloadable!]
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