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Electing a parliament


  • De Sinopoli, Francesco
  • Ferraris, Leo
  • Iannantuoni, Giovanna


We present a model where a society elects a parliament by voting for candidates belonging to two parties. The electoral rule determines the seats distribution between the two parties. We analyze two electoral rules, multidistrict majority and single-district proportional. In this framework, the policy outcome is simply a function of the number of seats parties take in the election. We prove that in both systems there is a unique pure strategy perfect equilibrium outcome. Finally, we compare the outcomes in the two systems.

Suggested Citation

  • De Sinopoli, Francesco & Ferraris, Leo & Iannantuoni, Giovanna, 2007. "Electing a parliament," UC3M Working papers. Economics we073319, Universidad Carlos III de Madrid. Departamento de Economía.
  • Handle: RePEc:cte:werepe:we073319

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    • Francesco De Sinopoli & Leo Ferraris & Giovanna Iannantuoni, 2008. "Electing a Parliament," Working Papers 150, University of Milano-Bicocca, Department of Economics, revised Dec 2008.

    References listed on IDEAS

    1. Torsten Persson, 2002. "Do Political Institutions Shape Economic Policy?," Econometrica, Econometric Society, vol. 70(3), pages 883-905, May.
    2. Stephen Coate & Brian Knight, 2007. "Socially Optimal Districting: A Theoretical and Empirical Exploration," The Quarterly Journal of Economics, Oxford University Press, vol. 122(4), pages 1409-1471.
    3. 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.
    4. Francesco Sinopoli & Giovanna Iannantuoni, 2007. "A spatial voting model where proportional rule leads to two-party equilibria," International Journal of Game Theory, Springer;Game Theory Society, vol. 35(2), pages 267-286, January.
    5. Timothy Besley & Ian Preston, 2007. "Electoral Bias and Policy Choice: Theory and Evidence," The Quarterly Journal of Economics, Oxford University Press, vol. 122(4), pages 1473-1510.
    6. Jean-François Mertens, 1989. "Stable Equilibria---A Reformulation," Mathematics of Operations Research, INFORMS, vol. 14(4), pages 575-625, November.
    7. Alesina, Alberto & Rosenthal, Howard, 1996. "A Theory of Divided Government," Econometrica, Econometric Society, vol. 64(6), pages 1311-1341, November.
    8. Persson, Torsten & Tabellini, Guido, 1999. "The size and scope of government:: Comparative politics with rational politicians," European Economic Review, Elsevier, vol. 43(4-6), pages 699-735, April.
    9. Ehud Kalai & Dov Samet, 1982. "Persistent Equilibria in Strategic Games," Discussion Papers 515, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
    10. Kohlberg, Elon & Mertens, Jean-Francois, 1986. "On the Strategic Stability of Equilibria," Econometrica, Econometric Society, vol. 54(5), pages 1003-1037, September.
    11. Moulin, Herve, 1979. "Dominance Solvable Voting Schemes," Econometrica, Econometric Society, vol. 47(6), pages 1137-1151, November.
    12. Faruk Gul & Wolfgang Pesendorfer, 2010. "Strategic Redistricting," American Economic Review, American Economic Association, vol. 100(4), pages 1616-1641, September.
    13. repec:hrv:faseco:34222831 is not listed on IDEAS
    14. repec:cup:apsrev:v:76:y:1982:i:04:p:753-766_18 is not listed on IDEAS
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    More about this item


    Majority election;

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior

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