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Party Formation Incollective Decision-Making

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  • Martin J. Osborne
  • Rabee Tourky

Abstract

We study party formation in a general model of collective decisionmaking, modeling parties as agglomerations of policy positions championed by decision-makers. We show that if there are economies of party size and the policy chosen is not beaten by another policy in pairwise voting, then players agglomerate into exactly two parties. This result does not depend on the magnitude of the economies of party size or sensitively on the nature of the individuals' preferences. Our analysis encompasses a wide range of models, including decision-making in committees with costly participation and representative democracy in which the legislature is elected by citizens.

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Bibliographic Info

Paper provided by The University of Melbourne in its series Department of Economics - Working Papers Series with number 844.

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Length: 36 pages
Date of creation: 2002
Date of revision:
Handle: RePEc:mlb:wpaper:844

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  1. Martin J. Osborne & Al Slivinksi, 1995. "A Model of Political Competition with Citizen-Candidates," Department of Economics Working Papers 1995-01, McMaster University.
  2. Martin Osborne & Jeffry Rosenthal & Matthew A. Turner, 1998. "Meetings with costly participation," Working Papers mturner-98-02, University of Toronto, Department of Economics.
  3. Massimo Morelli, 2004. "Party Formation and Policy Outcomes under Different Electoral Systems," Review of Economic Studies, Oxford University Press, vol. 71(3), pages 829-853.
  4. Ignacio Ortuno-Ortin & Anke Gerber, 1998. "Political compromise and endogenous formation of coalitions," Social Choice and Welfare, Springer, vol. 15(3), pages 445-454.
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Cited by:
  1. Siddhartha Bandyopadhyay & Mandar Oak, 2006. "Coalition Governments in a Model of Parliamentary Democracy," Working Papers 2006.83, Fondazione Eni Enrico Mattei.
  2. Siddhartha Bandyopadhyay & Kalyan Chatterjee & Tomas Sjostrom, 2010. "Pre-Electoral Coalitions and Post-Election Bargaining," Discussion Papers 09-10r, Department of Economics, University of Birmingham.
  3. Dhillon, Amrita, 2004. "Political Parties And Coalition Formation," The Warwick Economics Research Paper Series (TWERPS) 697, University of Warwick, Department of Economics.
  4. Siddhartha Bandyopadhyay & Mandar Oak, 2004. "Party Formation and Coalitional Bargaining in a Model of Proportional Representation," Working Papers 2004.98, Fondazione Eni Enrico Mattei.
  5. Bernhardt, Dan & Campuzano, Larissa & Squintani, Francesco & Câmara, Odilon, 2009. "On the benefits of party competition," Games and Economic Behavior, Elsevier, vol. 66(2), pages 685-707, July.

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