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Social Media and Democracy

Author

Listed:
  • Gradwohl, Ronen
  • Heller, Yuval
  • Hillman, Arye

Abstract

We study the ability of a social media platform with a political agenda to influence voting outcomes. Our benchmark is Condorcet’s jury theorem, which states that the likelihood of a correct decision under majority voting increases with the number of voters. We show how information manipulation by a social media platform can overturn the jury theorem, thereby undermining democracy. We also show that sometimes the platform can do so only by providing information that is biased in the opposite direction of its preferred outcome. Finally, we compare manipulation of voting outcomes through social media to manipulation through traditional media.

Suggested Citation

  • Gradwohl, Ronen & Heller, Yuval & Hillman, Arye, 2022. "Social Media and Democracy," MPRA Paper 113609, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:113609
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    References listed on IDEAS

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    1. Vincent Pons & Clémence Tricaud, 2018. "Expressive Voting and Its Cost: Evidence From Runoffs With Two or Three Candidates," Econometrica, Econometric Society, vol. 86(5), pages 1621-1649, September.
    2. Kerman, Toygar & Herings, P. Jean-Jacques & Karos, Dominik, 2020. "Persuading Strategic Voters," Research Memorandum 004, Maastricht University, Graduate School of Business and Economics (GSBE).
    3. Timothy Feddersen & Wolfgang Pesendorfer, 1997. "Voting Behavior and Information Aggregation in Elections with Private Information," Econometrica, Econometric Society, vol. 65(5), pages 1029-1058, September.
    4. Junze Sun & Arthur Schram & Randolph Sloof, 2019. "A Theory on Media Bias and Elections," Tinbergen Institute Discussion Papers 19-048/I, Tinbergen Institute.
    5. Feddersen, Timothy & Pesendorfer, Wolfgang, 1998. "Convicting the Innocent: The Inferiority of Unanimous Jury Verdicts under Strategic Voting," American Political Science Review, Cambridge University Press, vol. 92(1), pages 23-35, March.
    6. Kaushik Mukhopadhaya, 2003. "Jury Size and the Free Rider Problem," The Journal of Law, Economics, and Organization, Oxford University Press, vol. 19(1), pages 24-44, April.
    7. Daron Acemoglu & Munther A. Dahleh & Ilan Lobel & Asuman Ozdaglar, 2011. "Bayesian Learning in Social Networks," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 78(4), pages 1201-1236.
    8. Austen-Smith, David & Banks, Jeffrey S., 1996. "Information Aggregation, Rationality, and the Condorcet Jury Theorem," American Political Science Review, Cambridge University Press, vol. 90(1), pages 34-45, March.
    9. Arieli, Itai & Babichenko, Yakov, 2019. "Private Bayesian persuasion," Journal of Economic Theory, Elsevier, vol. 182(C), pages 185-217.
    10. Elhanan Helpman & Gene M. Grossman, 1999. "Competing for Endorsements," American Economic Review, American Economic Association, vol. 89(3), pages 501-524, June.
    11. A. Arda Gitmez & Pooya Molavi, 2022. "Informational Autocrats, Diverse Societies," Papers 2203.12698, arXiv.org, revised Aug 2023.
    12. Prat, Andrea, 2002. "Campaign Spending with Office-Seeking Politicians, Rational Voters, and Multiple Lobbies," Journal of Economic Theory, Elsevier, vol. 103(1), pages 162-189, March.
    13. Philipp Denter & Martin Dumav & Boris Ginzburg, 2021. "Social Connectivity, Media Bias, and Correlation Neglect," The Economic Journal, Royal Economic Society, vol. 131(637), pages 2033-2057.
    14. Carl Heese & Stephan Lauermann, 2021. "Persuasion and Information Aggregation in Elections," ECONtribute Discussion Papers Series 112, University of Bonn and University of Cologne, Germany.
    15. Arye L. Hillman & Heinrich W. Ursprung, 2008. "Domestic Politics, Foreign Interests, and International Trade Policy," Springer Books, in: Roger D. Congleton & Kai A. Konrad & Arye L. Hillman (ed.), 40 Years of Research on Rent Seeking 2, pages 113-129, Springer.
    16. , & ,, 2009. "A resurrection of the Condorcet Jury Theorem," Theoretical Economics, Econometric Society, vol. 4(2), June.
    17. Anthony Downs, 1957. "An Economic Theory of Political Action in a Democracy," Journal of Political Economy, University of Chicago Press, vol. 65(2), pages 135-135.
    18. Emir Kamenica, 2019. "Bayesian Persuasion and Information Design," Annual Review of Economics, Annual Reviews, vol. 11(1), pages 249-272, August.
    19. Spenkuch, Jörg L., 2018. "Expressive vs. strategic voters: An empirical assessment," Journal of Public Economics, Elsevier, vol. 165(C), pages 73-81.
    20. Ro'ee Levy, 2021. "Social Media, News Consumption, and Polarization: Evidence from a Field Experiment," American Economic Review, American Economic Association, vol. 111(3), pages 831-870, March.
    21. Arieli, Itai & Babichenko, Yakov & Smorodinsky, Rann, 2020. "Identifiable information structures," Games and Economic Behavior, Elsevier, vol. 120(C), pages 16-27.
    22. Hillman, Arye L., 2010. "Expressive behavior in economics and politics," European Journal of Political Economy, Elsevier, vol. 26(4), pages 403-418, December.
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    More about this item

    Keywords

    Bayesian persuasion; Political agenda; Information manipulation; Condorcet Jury Theorem; Biased signals;
    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
    • P16 - Political Economy and Comparative Economic Systems - - Capitalist Economies - - - Capitalist Institutions; Welfare State

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