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Simple Plurality versus Plurality Runoff with Privately Informed Voters

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Author Info
Cesar Martinelli (Centro de Investigacion Economica (CIE), Instituto Tecnologico Autonomo de Mexico (ITAM))

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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 between their favorite candidates, they increase the probability that the winner of the election is not one of them. 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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File URL: http://ftp.itam.mx/pub/academico/inves/martinelli/00-04.pdf
File Format: application/pdf
File Function: First version, 2000
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Publisher Info
Paper provided by Centro de Investigacion Economica, ITAM in its series Working Papers with number 0004.

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Length: 26 pages
Date of creation: Sep 2000
Date of revision:
Handle: RePEc:cie:wpaper:0004

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. 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. [Downloadable!] (restricted)
  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. [Downloadable!] (restricted)
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  3. 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. [Downloadable!]
  4. Feddersen, Timothy J & Pesendorfer, Wolfgang, 1996. "The Swing Voter's Curse," American Economic Review, American Economic Association, vol. 86(3), pages 408-24, June.
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    • Timothy J. Feddersen & Wolfgang Pesendorfer, 1995. "The Swing Voter's Curse," Discussion Papers 1064, Northwestern University, Center for Mathematical Studies in Economics and Management Science. [Downloadable!]
  5. 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. [Downloadable!]
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  6. 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.
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  1. Jeffrey O’Neill, 2007. "Choosing a runoff election threshold," Public Choice, Springer, vol. 131(3), pages 351-364, June. [Downloadable!] (restricted)
  2. Laurent Bouton & Micael Castanheira, 2008. "One person, Many Votes: Divided Majority and Information Aggregation," ECARES Working Papers 2008_017, Université Libre de Bruxelles, Ecares. [Downloadable!]
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