Abstract
We provide a new characterisation of the set of stationary equilibria for finite discounted N-player stochastic games, based on the definition of an auxiliary one-shot game with the same set of equilibria. This result is the extension, to the N-player case, of a similar characterisation for two-player zero-sum stochastic games (Attia and Oliu-Barton in Proc Natl Acad Sci USA 116:26435–26443, 2019) which led to a tractable formula for the limit value. Though the general case presents additional challenges, our characterisation may have further applications, notably in terms of the description and computation of stationary equilibria and of their limit as the discount rates vanish.
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The authors are indebted to Bruno Ziliotto, Bernhard Von Stengel, and to the anonymous referees for their insightful remarks on earlier versions of this draft.
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This work is supported by a grant from the “Fondation CFM pour la Recherche.” The second author acknowledges the support of the French Agence Nationale de la Recherche (ANR) under reference ANR-21-CE40-0020 (CONVERGENCE project).
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Attia, L., Oliu-Barton, M. Stationary Equilibria in Discounted Stochastic Games. Dyn Games Appl 14, 271–284 (2024). https://doi.org/10.1007/s13235-023-00495-x
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DOI: https://doi.org/10.1007/s13235-023-00495-x