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Pre-Electoral Coalitions and Post-Election Bargaining


  • Siddhartha Bandyopadhyay
  • Kalyan Chatterjee
  • Tomas Sjostrom


We study a game-theoretic model where political parties can form coalitions both before and after the elections. Before election, coalitions can commit to a seat-sharing arrangement, but not to a policy or to a division of rents from office; coalition members are free to break up and join other coalitions after the election. Equilibrium pre-electoral coalitions are not necessarily made up of the most ideologically similar parties, and they form under proportional representation as well as plurality rule. They do so to avoid "splitting the vote", but also because seat-sharing arrangements will influence the ex post bargaining and coalition formation.

Suggested Citation

  • Siddhartha Bandyopadhyay & Kalyan Chatterjee & Tomas Sjostrom, 2010. "Pre-Electoral Coalitions and Post-Election Bargaining," Discussion Papers 09-10r, Department of Economics, University of Birmingham.
  • Handle: RePEc:bir:birmec:09-10r

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    References listed on IDEAS

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    Cited by:

    1. Hughes, Niall, 2016. "Voting in legislative elections under plurality rule," Journal of Economic Theory, Elsevier, vol. 166(C), pages 51-93.
    2. Francesco Giovannoni & Daniel Seidmann, 2014. "Corruption and power in democracies," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 42(3), pages 707-734, March.
    3. Morelli, Massimo & Park, In-Uck, 2016. "Internal hierarchy and stable coalition structures," Games and Economic Behavior, Elsevier, vol. 96(C), pages 90-96.
    4. Daniel Diermeier & Pohan Fong, 2011. "Legislative Bargaining with Reconsideration," The Quarterly Journal of Economics, Oxford University Press, vol. 126(2), pages 947-985.

    More about this item


    Ex ante coalition; ex post bargaining;

    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
    • H19 - Public Economics - - Structure and Scope of Government - - - Other

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