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Voting blocs, party discipline and party formation


  • Eguia, Jon X.


I study the strategic incentives to coordinate votes in an assembly. Coalitions form voting blocs, acting as single players and affecting the policy outcome. In an assembly with two exogenous parties I show how the incentives to accept party discipline depend on the types of the agents, the sizes of the parties, and the rules the blocs use to aggregate preferences. In a game of fully endogenous party formation, I find sufficient conditions for the existence of equilibria with one bloc, two blocs, and multiple blocs.

Suggested Citation

  • Eguia, Jon X., 2011. "Voting blocs, party discipline and party formation," Games and Economic Behavior, Elsevier, vol. 73(1), pages 111-135, September.
  • Handle: RePEc:eee:gamebe:v:73:y:2011:i:1:p:111-135

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    References listed on IDEAS

    1. Annick Laruelle & Federico Valenciano, 2005. "Assessing success and decisiveness in voting situations," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 24(1), pages 171-197, January.
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    8. Justin Fox, 2006. "Legislative Cooperation among Impatient Legislators," Journal of Theoretical Politics, , vol. 18(1), pages 68-97, January.
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    10. Jackson, Matthew O. & Moselle, Boaz, 2002. "Coalition and Party Formation in a Legislative Voting Game," Journal of Economic Theory, Elsevier, vol. 103(1), pages 49-87, March.
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    12. Bloch, Francis & Gomes, Armando, 2006. "Contracting with externalities and outside options," Journal of Economic Theory, Elsevier, vol. 127(1), pages 172-201, March.
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    14. Sang-Seung Yi, 2003. "Endogenous formation of economic coalitions: a survey of the partition function approach," Chapters,in: The Endogenous Formation of Economic Coalitions, chapter 3 Edward Elgar Publishing.
    15. Madeleine O. Hosli, 2000. "Coalition Formation and Voting in the Council of the European Union," Homo Oeconomicus, Institute of SocioEconomics, vol. 17, pages 31-55.
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    17. Moshé Machover & Dan S. Felsenthal, 2002. "Annexations and alliances: When are blocs advantageous a priori?," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 19(2), pages 295-312.
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    Cited by:

    1. Zudenkova, Galina, 2011. "A Model of Party Discipline in a Congress," Working Papers 2072/151813, Universitat Rovira i Virgili, Department of Economics.
    2. Zudenkova, Galina, 2012. "A rationale for intra-party democracy," MPRA Paper 39091, University Library of Munich, Germany.
    3. Jon X. Eguia, 2013. "The Origin of Parties: The United States Congress in 1789–1797 as a Test Case," Economics and Politics, Wiley Blackwell, vol. 25(3), pages 313-334, November.
    4. Pech, Gerald, 2012. "Intra-party decision making, party formation, and moderation in multiparty systems," Mathematical Social Sciences, Elsevier, vol. 63(1), pages 14-22.
    5. Motz, Nicolas, 2016. "How Political Parties Shape Electoral Competition," MPRA Paper 69351, University Library of Munich, Germany.


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