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What Forms the Trajectory of Social Reforms? The Roles of Decision Rules and Communication under Epistemic Uncertainty

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  • Taiga Tsubota

    (The University of Tokyo)

  • Masahide Horita

    (The University of Tokyo)

Abstract

This paper presents a theoretical model that explains how decision rules and communication jointly affect collective outcomes in a small community under epistemic uncertainty. To see the likelihood of social reform and the probability of sensible decision-making under uncertainty, we compare two types of decision rules: unanimity rule and majority rule with veto. Also, we analyze the role of communication among voters before the voting occurs. We show that there exist equilibria and that once each player’s preference is determined, the equilibrium behavior is specified. In addition, we use simulation methods to examine how the precision of group decision and the voters’ welfare vary.

Suggested Citation

  • Taiga Tsubota & Masahide Horita, 2022. "What Forms the Trajectory of Social Reforms? The Roles of Decision Rules and Communication under Epistemic Uncertainty," Group Decision and Negotiation, Springer, vol. 31(1), pages 187-212, February.
    • Handle: RePEc:spr:grdene:v:31:y:2022:i:1:d:10.1007_s10726-021-09763-w
    DOI: 10.1007/s10726-021-09763-w
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    References listed on IDEAS

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    1. Laurent Bouton & Aniol Llorente-Saguer & Frédéric Malherbe, 2018. "Get Rid of Unanimity Rule: The Superiority of Majority Rules with Veto Power," Journal of Political Economy, University of Chicago Press, vol. 126(1), pages 107-149.
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    7. McLennan, Andrew, 1998. "Consequences of the Condorcet Jury Theorem for Beneficial Information Aggregation by Rational Agents," American Political Science Review, Cambridge University Press, vol. 92(2), pages 413-418, June.
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