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Monotonicity in Condorcet Jury Theorem under Strategic Voting

Author

Listed:
  • Naruto Nagaoka

    (Kobe Gakuin University)

Abstract

The Condorcet jury theorem states that if members' voting probabilities for the better alternative are identical and independent among members, and larger than 1/2, then the probability that a committee under simple majority voting chooses the better alternative is monotonically increasing in the committee size. This implies that the committee under simple majority voting decides more efficiently than single-person decision-making. This superiority of group decision-making under strategic voting for the binary signal model has already been demonstrated. We generalize this result and prove that the monotonicity property in the Condorcet jury theorem holds in the symmetric efficient equilibrium.

Suggested Citation

  • Naruto Nagaoka, 2019. "Monotonicity in Condorcet Jury Theorem under Strategic Voting," Economics Bulletin, AccessEcon, vol. 39(4), pages 2688-2696.
    • Handle: RePEc:ebl:ecbull:eb-19-00343
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    Condorcet jury theorem; decision-making in committees; strategic voting;
    All these keywords.

    JEL classification:

    • D7 - Microeconomics - - Analysis of Collective Decision-Making

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