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Competitive equilibrium in Markets for Votes

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  • Casella, Alessandra
  • Llorente-Saguer, Aniol
  • Palfrey, Thomas R

Abstract

We develop a competitive equilibrium theory of a market for votes. Before voting on a binary issue, individuals may buy and sell their votes with each other. We define the concept of Ex Ante Vote-Trading Equilibrium, identify weak sufficient conditions for existence, and construct one such equilibrium. We show that this equilibrium must always result in dictatorship and the market generates welfare losses, relative to simple majority voting, if the committee is large enough. We test the theoretical implications by implementing a competitive vote market in the laboratory using a continuous open-book multi-unit double auction.

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Bibliographic Info

Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 7992.

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Date of creation: Sep 2010
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Handle: RePEc:cpr:ceprdp:7992

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Keywords: Competitive Equilibrium; Experiments; Markets; Vote Trading; Voting;

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References

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  1. Casella, Alessandra & Palfrey, Thomas R. & Riezman, Raymond, 2006. "Minorities and storable votes," Working Papers 1261, California Institute of Technology, Division of the Humanities and Social Sciences.
  2. Forsythe, Robert & Palfrey, Thomas R. & Plott, Charles R., . "Asset Valuation in an Experimental Market," Working Papers 299, California Institute of Technology, Division of the Humanities and Social Sciences.
  3. Engelmann, Dirk & Grimm, Veronika, 2008. "Mechanisms for efficient voting with private information about preferences," IWQW Discussion Paper Series 03/2008, Friedrich-Alexander-Universität Erlangen-Nürnberg, Institut für Wirtschaftspolitik und Quantitative Wirtschaftsforschung (IWQW).
  4. Plott, Charles R, 1982. "Industrial Organization Theory and Experimental Economics," Journal of Economic Literature, American Economic Association, vol. 20(4), pages 1485-1527, December.
  5. Rafael Hortala-Vallve, 2007. "Qualitative Voting," Economics Series Working Papers 320, University of Oxford, Department of Economics.
  6. Stefano Demichelis & Klaus Ritzberger, 2007. "Corporate Control and the Stock Market," Carlo Alberto Notebooks 60, Collegio Carlo Alberto.
  7. Prescott, Edward C & Townsend, Robert M, 1984. "Pareto Optima and Competitive Equilibria with Adverse Selection and Moral Hazard," Econometrica, Econometric Society, vol. 52(1), pages 21-45, January.
  8. Smith, Vernon L, 1982. "Microeconomic Systems as an Experimental Science," American Economic Review, American Economic Association, vol. 72(5), pages 923-55, December.
  9. Alessandra Casella, 2002. "Storable Votes," NBER Working Papers 9189, National Bureau of Economic Research, Inc.
  10. d'ASPREMONT, Claude & GERARD-VARET, Louis-André, . "Incentives and incomplete information," CORE Discussion Papers RP -354, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  11. Danilov, Vladimir & Koshevoy, Gleb & Murota, Kazuo, 2001. "Discrete convexity and equilibria in economies with indivisible goods and money," Mathematical Social Sciences, Elsevier, vol. 41(3), pages 251-273, May.
  12. Carmen Beviá Baeza & José Angel Silva Reus, 1997. "Buying several indivisible goods," Working Papers. Serie AD 1997-27, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
  13. A. Colin Cameron & Jonah B. Gelbach & Douglas L. Miller, 2007. "Bootstrap-Based Improvements for Inference with Clustered Errors," NBER Technical Working Papers 0344, National Bureau of Economic Research, Inc.
  14. Dekel, Eddie & Jackson, Matthew O. & Wolinsky, Asher, 2009. "Vote Buying: Legislatures and Lobbying," International Quarterly Journal of Political Science, now publishers, vol. 4(2), pages 103-128, July.
  15. Goeree, Jacob K. & Holt, Charles A. & Palfrey, Thomas R., 2003. "Risk averse behavior in generalized matching pennies games," Games and Economic Behavior, Elsevier, vol. 45(1), pages 97-113, October.
  16. Vernon L. Smith, 1965. "Experimental Auction Markets and the Walrasian Hypothesis," Journal of Political Economy, University of Chicago Press, vol. 73, pages 387.
  17. Cox, James C & Smith, Vernon L & Walker, James M, 1988. " Theory and Individual Behavior of First-Price Auctions," Journal of Risk and Uncertainty, Springer, vol. 1(1), pages 61-99, March.
  18. Yang, Zaifu, 2000. "Equilibrium in an exchange economy with multiple indivisible commodities and money," Journal of Mathematical Economics, Elsevier, vol. 33(3), pages 353-365, April.
  19. Plott, Charles R. & Gray, Peter, 1990. "The multiple unit double auction," Journal of Economic Behavior & Organization, Elsevier, vol. 13(2), pages 245-258, March.
  20. Hortala-Vallve, Rafael & Llorente-Saguer, Aniol, 2010. "A simple mechanism for resolving conflict," Games and Economic Behavior, Elsevier, vol. 70(2), pages 375-391, November.
  21. Mailath, George J & Postlewaite, Andrew, 1990. "Asymmetric Information Bargaining Problems with Many Agents," Review of Economic Studies, Wiley Blackwell, vol. 57(3), pages 351-67, July.
  22. Klaus Kultti & Hannu Salonen, 2005. "Market for Votes," Homo Oeconomicus, Institute of SocioEconomics, vol. 23, pages 323-332.
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Citations

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Cited by:
  1. Matias Iaryczower & Santiago Oliveros, 2013. "Power Brokers: Middlemen in Legislative Bargaining," Economics Discussion Papers 731, University of Essex, Department of Economics.
  2. Alessandra Casella & Thomas Palfrey & Sébastien Turban, 2012. "Vote Trading With and Without Party Leaders," NBER Working Papers 17847, National Bureau of Economic Research, Inc.
  3. Drexl, Moritz & Kleiner, Andreas, 2013. "Preference Intensities in Repeated Collective Decision-Making," Annual Conference 2013 (Duesseldorf): Competition Policy and Regulation in a Global Economic Order 79832, Verein für Socialpolitik / German Economic Association.

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