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Robust Median Voter Rules

Author

Listed:
  • Steven Kivinen

    (University of Graz, Austria)

  • Norovsambuu Tumennasan

    (Dalhousie University, Canada)

Abstract

Generalized median voter (GMV) rules on the single-peaked preference domain are group strategy-proof. We show that if incomplete information coexists with the ability to commit to coalitional agreements, then GMV rules can be susceptible to insincere voting by groups with heterogeneous beliefs. We identify strategic compromise as a novel source of insincere voting in this environment. Our two main results characterize the set of fair, efficient, and robust voting rules: those that ensure sincere voting under asymmetric information and coalition formation. Each result uses a different notion of robustness, and both give (at most) two alternatives special treatment, with the remaining alternatives chosen according to a type of consensus.

Suggested Citation

  • Steven Kivinen & Norovsambuu Tumennasan, 2025. "Robust Median Voter Rules," Graz Economics Papers 2025-15, University of Graz, Department of Economics.
    • Handle: RePEc:grz:wpaper:2025-15
    as

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    References listed on IDEAS

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    JEL classification:

    • C71 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Cooperative Games
    • C78 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Bargaining Theory; Matching Theory
    • D70 - Microeconomics - - Analysis of Collective Decision-Making - - - General
    • D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General

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