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Mixed Motives and the Optimal Size of Voting Bodies

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  • John Morgan
  • Felix Várdy

Abstract

We study a Condorcet jury model where voters are driven by instrumental and expressive motives. We show that arbitrarily small amounts of expressive motives significantly affect equilibrium behavior and the optimal size of voting bodies. Enlarging voting bodies always reduces accuracy over some region. Unless conflict between expressive and instrumental preferences is very low, information does not aggregate in the limit, and large voting bodies perform no better than a coin flip in selecting the correct outcome. Thus, even when adding informed voters is costless, smaller voting bodies often produce better decisions.

Suggested Citation

  • John Morgan & Felix Várdy, 2012. "Mixed Motives and the Optimal Size of Voting Bodies," Journal of Political Economy, University of Chicago Press, vol. 120(5), pages 986-1026.
    • Handle: RePEc:ucp:jpolec:doi:10.1086/668838
    DOI: 10.1086/668838
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    Cited by:

    1. Maaser, Nicola & Stratmann, Thomas, 2024. "Costly voting in weighted committees: The case of moral costs," European Economic Review, Elsevier, vol. 162(C).
    2. Midjord, Rune & Rodríguez Barraquer, Tomás & Valasek, Justin, 2021. "When voters like to be right: An analysis of the Condorcet Jury Theorem with mixed motives," Journal of Economic Theory, Elsevier, vol. 198(C).
    3. Cameron Guage & Feng Fu, 2021. "Asymmetric Partisan Voter Turnout Games," Dynamic Games and Applications, Springer, vol. 11(4), pages 738-758, December.
    4. Name-Correa, Alvaro J. & Yildirim, Huseyin, 2019. "Social pressure, transparency, and voting in committees," Journal of Economic Theory, Elsevier, vol. 184(C).
    5. Yves Breitmoser & Justin Valasek, 2024. "Strategic communication in committees with expressive payoffs," RAND Journal of Economics, RAND Corporation, vol. 55(1), pages 33-54, March.
    6. Ginzburg, Boris & Guerra, José-Alberto & Lekfuangfu, Warn N., 2022. "Counting on my vote not counting: Expressive voting in committees," Journal of Public Economics, Elsevier, vol. 205(C).
    7. Alan Gerber & Mitchell Hoffman & John Morgan & Collin Raymond, 2020. "One in a Million: Field Experiments on Perceived Closeness of the Election and Voter Turnout," American Economic Journal: Applied Economics, American Economic Association, vol. 12(3), pages 287-325, July.
    8. Midjord, Rune & Rodríguez Barraquer, Tomás & Valasek, Justin, 2013. "Over-caution of large committees of experts," Discussion Papers, Research Unit: Economics of Change SP II 2013-313, WZB Berlin Social Science Center.
    9. repec:esx:essedp:734 is not listed on IDEAS
    10. Chan, Jimmy & Gupta, Seher & Li, Fei & Wang, Yun, 2019. "Pivotal persuasion," Journal of Economic Theory, Elsevier, vol. 180(C), pages 178-202.
      • Jimmy Chan & Seher Gupta & Fei Li & Yun Wang, 2018. "Pivotal Persuasion," Working Papers 2018-11-03, Wang Yanan Institute for Studies in Economics (WISE), Xiamen University.
    11. Ralph-Christopher Bayer & Marco Faravelli & Carlos Pimienta, 2023. "The Wisdom of the Crowd: Uninformed Voting and the Efficiency of Democracy," Discussion Papers 2023-08, School of Economics, The University of New South Wales.
    12. Midjord, Rune & Rodríguez Barraquer, Tomás & Valasek, Justin, 2017. "Voting in large committees with disesteem payoffs: A ‘state of the art’ model," Games and Economic Behavior, Elsevier, vol. 104(C), pages 430-443.
    13. Santiago Oliveros & Felix Várdy, 2015. "Demand for Slant: How Abstention Shapes Voters' Choice of News Media," Economic Journal, Royal Economic Society, vol. 125(587), pages 1327-1368, September.
    14. Arenas, Andreu, 2016. "Sticky votes," Journal of Economic Behavior & Organization, Elsevier, vol. 132(PA), pages 12-25.
      • Andreu ARENAS, 2016. "Sticky Votes," LIDAM Reprints CORE 2763, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    15. Midjord, Rune & Rodríguez Barraquer, Tomás & Valasek, Justin, 2019. "Robust Information Aggregation Through Voting," Discussion Paper Series in Economics 12/2019, Norwegian School of Economics, Department of Economics.
    16. Breitmoser, Yves & Valasek, Justin, 2017. "A rationale for unanimity in committees," Discussion Papers, Research Unit: Economics of Change SP II 2017-308, WZB Berlin Social Science Center.
    17. Tajika, Tomoya, 2022. "Voting on tricky questions," Games and Economic Behavior, Elsevier, vol. 132(C), pages 380-389.
    18. Alvaro J. Name-Correa & Huseyin Yildirim, 2018. "A capture theory of committees," Public Choice, Springer, vol. 177(1), pages 135-154, October.
    19. Yves Breitmoser & Justin Valasek & Justin Mattias Valasek, 2023. "Why Do Committees Work?," CESifo Working Paper Series 10800, CESifo.
    20. Breitmoser, Yves & Valasek, Justin, 2023. "Why do committees work?," Discussion Paper Series in Economics 18/2023, Norwegian School of Economics, Department of Economics.
    21. Yaron Azrieli & Dan Levin, 2020. "Stable unions," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 69(2), pages 337-365, March.
    22. Martins, Rodrigo & Veiga, Francisco José, 2014. "Does voter turnout affect the votes for the incumbent government?," European Journal of Political Economy, Elsevier, vol. 36(C), pages 274-286.

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