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Voting with public information

Author

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  • Shuo Liu
Abstract
We study the effect of public information on collective decision-making in committees, where members can have both common and conflicting interests. In the presence of public information, the simple and efficient vote-your-signal strategy profile no longer constitutes an equilibrium under the commonly-used simultaneous voting rules, while the intuitive but inefficient follow-the-expert strategy profile almost always does. Although more information may be aggregated if agents are able to coordinate on more sophisticated equilibria, inefficiency can persist even in large elections if the provision of public information introduces general correlation between the signals observed by the agents. We propose simple voting procedures that can indirectly implement the outcomes of optimal anonymous and ex post incentive compatible mechanisms with public information. The proposed voting procedures also have additional advantages when there is a concern for strategic disclosure of public information.

Suggested Citation

  • Shuo Liu, 2015. "Voting with public information," ECON - Working Papers 191, Department of Economics - University of Zurich, revised Jun 2017.
    • Handle: RePEc:zur:econwp:191
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    File URL: https://www.zora.uzh.ch/id/eprint/110569/7/econwp191.pdf
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    References listed on IDEAS

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    Cited by:

    1. Buechel, Berno & Mechtenberg, Lydia, 2019. "The swing voter's curse in social networks," Games and Economic Behavior, Elsevier, vol. 118(C), pages 241-268.
    2. Berno Buechel & Lydia Mechtenberg & Alexander F. Wagner, 2022. "When do proxy advisors improve corporate decisions?," Swiss Finance Institute Research Paper Series 22-47, Swiss Finance Institute.
    3. Kohei Kawamura & Vasileios Vlaseros, 2015. "Expert Information and Majority Decisions," Edinburgh School of Economics Discussion Paper Series 261, Edinburgh School of Economics, University of Edinburgh.
    4. Gersbach, Hans, 2017. "Flexible Majority Rules in democracyville: A guided tour," Mathematical Social Sciences, Elsevier, vol. 85(C), pages 37-43.
    5. Giovanna M. Invernizzi, 2020. "Public Information: Relevance or Salience?," Games, MDPI, vol. 11(1), pages 1-28, January.
    6. Junze Sun & Arthur Schram & Randolph Sloof, 2019. "A Theory on Media Bias and Elections," Tinbergen Institute Discussion Papers 19-048/I, Tinbergen Institute.

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    More about this item

    Keywords

    Strategic voting; collective decision-making; public information; committee design; optimal voting rule; information disclosure;
    All these keywords.

    JEL classification:

    • D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design

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