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Uniqueness of stationary equilibria in bargaining one-dimensional policies under (super) majority rules


  • Cardona, Daniel
  • Ponsati, Clara


We consider negotiations selecting one-dimensional policies. Individuals have instantaneous preferences represented by continuous, concave and single-peaked utility functions, and they are impatient. Decisions arise from a bargaining game with random proposers and (super) majority approval, ranging from the simple majority up to unanimity. We provide sufficient conditions that guarantee the existence of a unique stationary subgame perfect equilibrium, and we provide its explicit characterization. The uniqueness of the equilibrium permits an analysis of the set of Pareto optimal voting rules. For symmetric distributions of peaks and uniform recognition probabilities unanimity is the unanimously preferred majority rule.

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  • Cardona, Daniel & Ponsati, Clara, 2011. "Uniqueness of stationary equilibria in bargaining one-dimensional policies under (super) majority rules," Games and Economic Behavior, Elsevier, vol. 73(1), pages 65-75, September.
  • Handle: RePEc:eee:gamebe:v:73:y:2011:i:1:p:65-75

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    References listed on IDEAS

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    10. Cardona, Daniel & Ponsati, Clara, 2007. "Bargaining one-dimensional social choices," Journal of Economic Theory, Elsevier, vol. 137(1), pages 627-651, November.
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    Cited by:

    1. Seok-ju Cho & John Duggan, 2015. "A folk theorem for the one-dimensional spatial bargaining model," International Journal of Game Theory, Springer;Game Theory Society, vol. 44(4), pages 933-948, November.
    2. Daniel Cardona & Clara Ponsatí, 2014. "Super-Majorites, One-Dimensional Policies, and Social Surplus," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 16(6), pages 884-898, December.
    3. Kalandrakis, Tasos, 2015. "Computation of equilibrium values in the Baron and Ferejohn bargaining model," Games and Economic Behavior, Elsevier, vol. 94(C), pages 29-38.
    4. Daniel Cardona & Arnold Polanski, 2013. "Voting rules and efficiency in one-dimensional bargaining games with endogenous protocol," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 41(2), pages 217-240, July.
    5. Ortner, Juan, 2017. "A theory of political gridlock," Theoretical Economics, Econometric Society, vol. 12(2), May.
    6. Daniel Cardona & Clara Ponsatí, 2013. "Super-majorites and collective surplus in one-dimensional bargaining: Numerical simulations," Economics Bulletin, AccessEcon, vol. 33(1), pages 278-288.
    7. Le Breton, Michel & Thomas, Alban & Zaporozhets, Vera, 2012. "Bargaining in River Basin Committees: Rules Versus Discretion," TSE Working Papers 12-324, Toulouse School of Economics (TSE).
    8. P. Herings & Arkadi Predtetchinski, 2015. "Procedural fairness and redistributive proportional tax," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 59(2), pages 333-354, June.
    9. Nicolás Porteiro & Antonio Villar, 2015. "Appointing high-court judges by political parties," SERIEs: Journal of the Spanish Economic Association, Springer;Spanish Economic Association, vol. 6(1), pages 91-99, March.
    10. Daniel Diermeier & Carlo Prato & Razvan Vlaicu, 2016. "A bargaining model of endogenous procedures," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 47(4), pages 985-1012, December.
    11. repec:kap:pubcho:v:173:y:2017:i:1:d:10.1007_s11127-017-0470-8 is not listed on IDEAS
    12. Daniel Cardona & Antoni Rubí-Barceló, 2014. "On the efficiency of equilibria in a legislative bargaining model with particularistic and collective goods," Public Choice, Springer, vol. 161(3), pages 345-366, December.
    13. Jan Zapal, 2014. "Simple Markovian Equilibria in Dynamic Spatial Legislative Bargaining," CERGE-EI Working Papers wp515, The Center for Economic Research and Graduate Education - Economics Institute, Prague.
    14. Juan Ortner, 2014. "Political Bargaining in a Changing World," 2014 Meeting Papers 445, Society for Economic Dynamics.


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