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Computing approximate pure Nash equilibria in congestion games

Author

Listed:
  • Ioannis Caragiannis

    (CTI - Computer Technology Institute - Computer Technology Institute)

  • Angelo Fanelli

    (CREM - Centre de recherche en économie et management - UNICAEN - Université de Caen Normandie - NU - Normandie Université - UR - Université de Rennes - CNRS - Centre National de la Recherche Scientifique, C2I - Centre for Computational Intelligence [Nanyang] - Nanyang Technological University [Singapour])

  • Nick Gravin

    (C2I - Centre for Computational Intelligence [Nanyang] - Nanyang Technological University [Singapour])

  • Alexander Skopalik

    (TU Dortmund University, Germany)

Abstract

Among other solution concepts, the notion of the pure Nash equilibrium plays a central role in Game Theory. Pure Nash equilibria in a game characterize situations with non-cooperative deterministic players in which no player has any incentive to unilaterally deviate from the current situation in order to achieve a higher payoff. Unfortunately, it is well known that there are games that do not have pure Nash equilibria. Furhermore, even in games where the existence of equilibria is guaranteed, their computation can be a computationally hard task. Such negative results significantly question the importance of pure Nash equilibria as solution concepts that characterize the behavior of rational players. Approximate pure Nash equilibria, which characterize situations where no player can significantly improve her payoff by unilaterally deviating from her current strategy, could serve as alternative solution concepts provided that they exist and can be computed efficiently. In this letter, we discuss recent positive algorithmic results for approximate pure Nash equilibria in congestion games.

Suggested Citation

  • Ioannis Caragiannis & Angelo Fanelli & Nick Gravin & Alexander Skopalik, 2012. "Computing approximate pure Nash equilibria in congestion games," Post-Print halshs-02094375, HAL.
    • Handle: RePEc:hal:journl:halshs-02094375
    DOI: 10.1145/2325713.2325718
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    Cited by:

    1. Vittorio Bilò & Mauro Paladini, 2016. "On the performance of mildly greedy players in cut games," Journal of Combinatorial Optimization, Springer, vol. 32(4), pages 1036-1051, November.
    2. Daskalakis, Constantinos & Papadimitriou, Christos H., 2015. "Approximate Nash equilibria in anonymous games," Journal of Economic Theory, Elsevier, vol. 156(C), pages 207-245.

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