A spatial voting model where proportional rule leads to two-party equilibria
In this paper we show that in a simple spatial model where the government is chosen under strict proportional rule, if the outcome function is a linear combination of parties' positions, with coefficients equal to their share of seats, only a two-party voting equilibrium basically exists. The two parties taking a positive number of votes are the two extremist ones. Applications of this result include an extension of the well-known Alesina and Rosenthal's model of divided government as well as a modified version of Besley and Coate's model of representative democracy. This result cannot be extended to a general outcome function but, however, when the policy is determined by the two leading parties, in pure strategies, only two-party equilibria can emerge. Analogous result holds for coalitions of parties.
|Date of creation:||00 Jul 2000|
|Date of revision:|
|Contact details of provider:|| Postal: Voie du Roman Pays 34, 1348 Louvain-la-Neuve (Belgium)|
Fax: +32 10474304
Web page: http://www.uclouvain.be/core
More information through EDIRC
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.:
- Tim Besley & Stephen Coate, .
"An Economic Model of Representative Democracy,"
Penn CARESS Working Papers
ecf70d639d700dba5327ab0c8, Penn Economics Department.
- Grossman, Gene & Helpman, Elhanan, 1996.
"Competing for Endorsements,"
CEPR Discussion Papers
1546, C.E.P.R. Discussion Papers.
- Gene M. Grossman & Elhanan Helpman, 1996. "Competing for Endorsements," Harvard Institute of Economic Research Working Papers 1784, Harvard - Institute of Economic Research.
- Grossman, G.M. & Helpman, E., 1998. "Competing for Endorsements," Papers 09-98, Tel Aviv.
- Grossman, G-M & Helpman, E, 1996. "Competing for Endorsements," Papers 182, Princeton, Woodrow Wilson School - Public and International Affairs.
- Alesina, Alberto & Rosenthal, Howard, 2000. "Polarized platforms and moderate policies with checks and balances," Journal of Public Economics, Elsevier, vol. 75(1), pages 1-20, January.
- 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.
- DE SINOPOLI, Francesco, .
"Sophisticated voting and equilibrium refinements under plurality rule,"
CORE Discussion Papers RP
1467, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- Francesco De Sinopoli, 2000. "Sophisticated voting and equilibrium refinements under plurality rule," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 17(4), pages 655-672.
- Roger B. Myerson & Robert J. Weber, 1988. "A Theory of Voting Equilibria," Discussion Papers 782, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Ignacio OrtuÓo-OrtÎn, 1997. "A spatial model of political competition and proportional representation," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 14(3), pages 427-438.
- Alesina, Alberto & Rosenthal, Howard, 1996. "A Theory of Divided Government," Econometrica, Econometric Society, vol. 64(6), pages 1311-41, November.
When requesting a correction, please mention this item's handle: RePEc:cor:louvco:2000037. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Alain GILLIS)
If references are entirely missing, you can add them using this form.