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Majority Rules and Coalition Stability

Author

Listed:
  • Sergio Currarini

    () (Department of Economics, Universita' degli Studi di Venezia & University of Bristol)

  • Marco Marini

    () (Department of Computer, Control and Management Engineering, Universita' degli Studi di Roma "La Sapienza")

Abstract

We consider a class of symmetric games with externalities across coalitions and show that, under certain regularity conditions, restricting the deviating power to majority guarantees the existence of core-stable allocations. We also show that if majorities can extract resources from minorities, stability requires a supermajority rule, whose threshold is increasing in the extraction power.

Suggested Citation

  • Sergio Currarini & Marco Marini, 2012. "Majority Rules and Coalition Stability," DIAG Technical Reports 2012-01, Department of Computer, Control and Management Engineering, Universita' degli Studi di Roma "La Sapienza".
  • Handle: RePEc:aeg:report:2012-01
    as

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    File URL: http://www.dis.uniroma1.it/~bibdis/RePEc/aeg/report/2012-01.pdf
    File Function: Revised version, 2012
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    References listed on IDEAS

    as
    1. Ray, Debraj & Vohra, Rajiv, 1997. "Equilibrium Binding Agreements," Journal of Economic Theory, Elsevier, vol. 73(1), pages 30-78, March.
    2. Ray, Debraj, 2007. "A Game-Theoretic Perspective on Coalition Formation," OUP Catalogue, Oxford University Press, number 9780199207954.
    3. Hafalir, Isa E., 2007. "Efficiency in coalition games with externalities," Games and Economic Behavior, Elsevier, vol. 61(2), pages 242-258, November.
    4. Bloch, Francis, 1996. "Sequential Formation of Coalitions in Games with Externalities and Fixed Payoff Division," Games and Economic Behavior, Elsevier, vol. 14(1), pages 90-123, May.
    5. Yi, Sang-Seung, 1997. "Stable Coalition Structures with Externalities," Games and Economic Behavior, Elsevier, vol. 20(2), pages 201-237, August.
    6. Partha Dasgupta & Eric Maskin, 2008. "On The Robustness of Majority Rule," Journal of the European Economic Association, MIT Press, vol. 6(5), pages 949-973, September.
    Full references (including those not matched with items on IDEAS)

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    Keywords

    Majority Rule; Supermajority; Externalities; Core;

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