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On the Set of Proper Equilibria of a Bimatrix Game


  • Jansen, Mathijs


In this paper it is proved that the set of proper equilibria of a bimatrix game is the finite union of polytopes. To that purpose we split up the strategy space of each player into a finite number of equivalence classes and consider for a given [epsilon] [greater than] 0 the set of all [epsilon]-proper pairs within the cartesian product of two equivalence classes. If this set is non-empty, its closure is a polytope. By considering this polytope as [epsilon] goes to zero, we obtain a (Myerson) set of proper equilibria. A Myerson set appears to be a polytope.

Suggested Citation

  • Jansen, Mathijs, 1993. "On the Set of Proper Equilibria of a Bimatrix Game," International Journal of Game Theory, Springer;Game Theory Society, vol. 22(2), pages 97-106.
  • Handle: RePEc:spr:jogath:v:22:y:1993:i:2:p:97-106

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    References listed on IDEAS

    1. Kreps, David M & Wilson, Robert, 1982. "Sequential Equilibria," Econometrica, Econometric Society, vol. 50(4), pages 863-894, July.
    2. Okada, A, 1988. "Perfect Equilibrium Points and Lexicographic Domination," International Journal of Game Theory, Springer;Game Theory Society, vol. 17(3), pages 225-239.
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    Cited by:

    1. Kleppe, John & Borm, Peter & Hendrickx, Ruud, 2012. "Fall back equilibrium," European Journal of Operational Research, Elsevier, vol. 223(2), pages 372-379.
    2. Fiestras-Janeiro, G. & Borm, P.E.M. & van Megen, F.J.C., 1996. "Protective Behavior in Games," Discussion Paper 1996-12, Tilburg University, Center for Economic Research.
    3. Dieter Balkenborg & Josef Hofbauer & Christoph Kuzmics, 2015. "The refined best-response correspondence in normal form games," International Journal of Game Theory, Springer;Game Theory Society, vol. 44(1), pages 165-193, February.
    4. repec:spr:compst:v:78:y:2013:i:2:p:171-186 is not listed on IDEAS
    5. John Kleppe & Peter Borm & Ruud Hendrickx, 2013. "Fall back equilibrium for $$2 \times n$$ bimatrix games," Mathematical Methods of Operations Research, Springer;Gesellschaft für Operations Research (GOR);Nederlands Genootschap voor Besliskunde (NGB), vol. 78(2), pages 171-186, October.

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