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Simple plurality versus plurality runoff with privately informed voters

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  • César Martinelli

    ()
    (Centro de Investigación Económica, Instituto Tecnológico Autónomo de México, México, D.F. 10700)

Abstract

This paper compares two voting methods commonly used in presidential elections: simple plurality voting and plurality runoff. In a situation in which a group of voters have common interests but do not agree on which candidate to support due to private information, information aggregation requires them to split their support between their favorite candidates. However, if a group of voters split their support, they increase the probability that the winner of the election is not one of their favorite candidates. In a model with three candidates, due to this tension between information aggregation and the need for coordination, plurality runoff leads to higher expected utility for the majority than simple plurality voting if the information held by voters about the candidates is not very accurate.

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Bibliographic Info

Article provided by Springer in its journal Social Choice and Welfare.

Volume (Year): 19 (2002)
Issue (Month): 4 ()
Pages: 901-919

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Handle: RePEc:spr:sochwe:v:19:y:2002:i:4:p:901-919

Note: Received: 12 September 2000/Accepted: 8 November 2001
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  1. Stephen Wright & William Riker, 1989. "Plurality and runoff systems and numbers of candidates," Public Choice, Springer, vol. 60(2), pages 155-175, February.
  2. Myerson, Roger B., 1998. "Extended Poisson Games and the Condorcet Jury Theorem," Games and Economic Behavior, Elsevier, vol. 25(1), pages 111-131, October.
  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. Roger B. Myerson, 1998. "Comparison of Scoring Rules in Poisson Voting Games," Discussion Papers 1214, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  5. Timothy J. Fedderson & Wolfgang Pesendorfer, 1996. "Abstention in Elections with Asymmetric Information and Diverse Preferences," Discussion Papers 1195, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  6. Feddersen, Timothy J & Pesendorfer, Wolfgang, 1996. "The Swing Voter's Curse," American Economic Review, American Economic Association, vol. 86(3), pages 408-24, June.
  7. McKelvey, Richard D. & Ordeshook, Peter C., 1985. "Elections with limited information: A fulfilled expectations model using contemporaneous poll and endorsement data as information sources," Journal of Economic Theory, Elsevier, vol. 36(1), pages 55-85, June.
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Cited by:
  1. Bouton, Laurent & Castanheira, Micael, 2008. "One Person, Many Votes: Divided Majority and Information Aggregation," CEPR Discussion Papers 6695, C.E.P.R. Discussion Papers.
  2. Laurent Bouton & Micael Castanheira & Aniol Llorente-Saguer, 2012. "Divided Majority and Information Aggregation: Theory and Experiment," Working Paper Series of the Max Planck Institute for Research on Collective Goods 2012_20, Max Planck Institute for Research on Collective Goods.
  3. Laurent Bouton & Gabriele Gratton, 2013. "Majority Runoff Elections: Strategic Voting and Duverger's Hypothesis," Discussion Papers 2013-23, School of Economics, The University of New South Wales.
  4. Laurent Bouton, 2013. "A Theory of Strategic Voting in Runoff Elections," American Economic Review, American Economic Association, vol. 103(4), pages 1248-88, June.
  5. Leonzio Rizzo & Alberto Zanardi, 2012. "Single vs double ballot and party coalitions: the impact on fiscal policy. Evidence from Italy," Working Papers 2012/33, Institut d'Economia de Barcelona (IEB).
  6. Jeffrey O’Neill, 2007. "Choosing a runoff election threshold," Public Choice, Springer, vol. 131(3), pages 351-364, June.
  7. P. Amorós & Ricardo Martínez & M. Socorro Puy, 2013. "The closed primaries versus the top-two primary," Economics Working Papers we1319, Universidad Carlos III, Departamento de Economía.

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