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On the Influence of Extreme Parties in Electoral Competition with Policy-Motivated Candidates

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Author Info
Casamatta, Georges
De Donder, Philippe

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Abstract

We study and compare equilibrium platforms in models of one-dimensional electoral competition with two and four policy-motivated parties. We first analyse the plurality game, where the party that gets the most votes is elected and implements its proposed platform. Restrictions on the set of credible announcements are needed to get existence of equilibria. Comparing equilibria with two and four parties, we obtain that moderate parties react to the introduction of extreme parties by proposing the same or more extreme equilibrium platforms. We then study the proportional system, where the policy implemented is a weighted sum of the proposals, with the voting shares as weights. Here, the existence of extreme parties leads moderate ones to choose more centrist platforms.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 3885.

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Date of creation: May 2003
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Handle: RePEc:cpr:ceprdp:3885

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Related research
Keywords: electoral competition; plurality rule; proportional system;

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Find related papers by JEL classification:
D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Models of Political Processes: Rent-seeking, Elections, Legislatures, and Voting Behavior

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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. Ignacio OrtuÓo-OrtÎn, 1997. "A spatial model of political competition and proportional representation," Social Choice and Welfare, Springer, vol. 14(3), pages 427-438. [Downloadable!] (restricted)
  2. Osborne Martin J., 1993. "Candidate Positioning and Entry in a Political Competition," Games and Economic Behavior, Elsevier, vol. 5(1), pages 133-151, January. [Downloadable!] (restricted)
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  3. Enriqueta Aragonés & Andrew Postlewaite, 2000. "Campaign Rhetoric: A Model of Reputation," Economics Working Papers 525, Department of Economics and Business, Universitat Pompeu Fabra. [Downloadable!]
  4. Palfrey, Thomas R, 1984. "Spatial Equilibrium with Entry," Review of Economic Studies, Blackwell Publishing, vol. 51(1), pages 139-56, January. [Downloadable!] (restricted)
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Cited by:
(explanations, 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. Raphaël Soubeyran, 2006. "When Inertia Generates Political Cycles," Economics Bulletin, Economics Bulletin, vol. 4(31), pages 1-8. [Downloadable!]
    Other versions:
  2. Selim Ergun, 2008. "Centrist's Curse? An Electoral Competition Model with Credibility Constraints," ThE Papers 08/06, Department of Economic Theory and Economic History of the University of Granada.. [Downloadable!]
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