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Ideology and Competence in Alternative Electoral Systems

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  • Matias Iaryczower
  • Andrea Mattozzi

Abstract

We develop a model of elections in proportional (PR) and majoritarian (FPTP) electoral systems. The model allows for an endogenous number of candidates, differentiation of candidates in a private value dimension, or ideology, and a common value dimension, which we interpret broadly as quality. Voters are fully rational and strategic. We show that the quality of the candidates is always at least as high in majoritarian electoral systems than in proportional electoral systems, and that the number of candidates is always at least as large in PR as in FPTP (where exactly two candidates run). Moreover, we provide conditions under which the rankings are strict. The diversity of ideological positions represented in elections can be larger in PR or FPTP elections. In the most efficient equilibrium, however, FPTP implies perfect convergence of candidates in the median. Since a convergent equilibrium can never occur in PR, and voters are risk averse, the most efficient equilibrium in FPTP dominates in terms of voters' welfare the most efficient equilirbium in PR.

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Paper provided by David K. Levine in its series Levine's Working Paper Archive with number 122247000000002387.

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Date of creation: 05 Oct 2008
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Handle: RePEc:cla:levarc:122247000000002387

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  1. David Austen-Smith, 2000. "Redistributing Income under Proportional Representation," Journal of Political Economy, University of Chicago Press, vol. 108(6), pages 1235-1269, December.
  2. Tim Besley & Stephen Coate, . ""An Economic Model of Representative Democracy''," CARESS Working Papres 95-02, University of Pennsylvania Center for Analytic Research and Economics in the Social Sciences.
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  9. Martin J. Osborne & Al Slivinksi, 1995. "A Model of Political Competition with Citizen-Candidates," Department of Economics Working Papers 1995-01, McMaster University.
  10. Myerson Roger B., 1993. "Effectiveness of Electoral Systems for Reducing Government Corruption: A Game-Theoretic Analysis," Games and Economic Behavior, Elsevier, vol. 5(1), pages 118-132, January.
  11. d'Aspremont, C & Gabszewicz, Jean Jaskold & Thisse, J-F, 1979. "On Hotelling's "Stability in Competition"," Econometrica, Econometric Society, vol. 47(5), pages 1145-50, September.
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  14. Alessro Lizzeri & Nicola Persico, . "The Provision of Public Goods Under Alternative Electoral Incentives," Penn CARESS Working Papers b96440ba0bfa06ca550ac40aa, Penn Economics Department.
  15. Kittsteiner, Thomas & Eyster, Erik, 2007. "Party platforms in electoral competition with heterogeneous constituencies," Theoretical Economics, Econometric Society, vol. 2(1), pages 41-70, March.
  16. Perloff, Jeffrey M & Salop, Steven, 1984. "Equilibrium with product differentiation," Department of Agricultural & Resource Economics, UC Berkeley, Working Paper Series qt4cq0m6s3, Department of Agricultural & Resource Economics, UC Berkeley.
  17. Austen-Smith, David & Banks, Jeffrey., 1987. "Elections, Coalitions, and Legislative Outcomes," Working Papers 643, California Institute of Technology, Division of the Humanities and Social Sciences.
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  19. repec:bla:restud:v:75:y:2008:i:3:p:671-697 is not listed on IDEAS
  20. Banks, Jeffrey S., 1990. "A model of electoral competition with incomplete information," Journal of Economic Theory, Elsevier, vol. 50(2), pages 309-325, April.
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