18 research outputs found

    Quitting games - An example

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    Les jeux d'arrĂȘt sont des jeux sĂ©quentiels oĂč, Ă  chaque Ă©tape, chacun des joueurs peut dĂ©cider d'arrĂȘter ou de continuer. Le jeu s'arrĂȘte dĂšs lors que l'un au moins des joueurs dĂ©cide de s'arrĂȘter. Le paiement reçu alors par les joueurs dĂ©pend de l'ensemble des joueurs qui ont choisi de s'arrĂȘter Ă  cette date. Si le jeu ne s'arrĂȘte jamais, le paiement est nul. Nous Ă©tudions un jeu Ă  quatre joueurs. Dans ce jeu, les Ă©quilibres les plus simples sont pĂ©riodiques de pĂ©riode deux. Par ailleurs, nous utilisons des outils gĂ©omĂ©triques pour montrer que les techniques utilisĂ©es pour les jeux Ă  trois joueurs ne peuvent ĂȘtre adaptĂ©es au cas gĂ©nĂ©ral.Jeux d'arrĂȘt;Jeux stochastiques;Equilibre

    Quitting games - an example

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    Quitting games are I-player sequential games in which, at any stage, each player has the choice between continuing and quitting. The game ends as soon as at least one player chooses to quit; player i then receives a payoff , which depends on the set S of players that did choose to quit. If the game never ends, the payoff to each player is zero.stopping games; equilibrium; stochastic games

    An Adversarial Algorithm for Delegation

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    A Coalitional Algorithm for Recursive Delegation

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    The challenge of non-zero-sum stochastic games

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    For a broad definition of time-discrete stochastic games, their zero-sum varieties have values. But the existence of Ï” -equilibrium for the corresponding non-zero-sum games has proven elusive. We present the problems associated with Ï” -equilibria in non-zero-sum stochastic games, from both the perspectives of proving existence and demonstrating a counter-example

    Absorption paths and equilibria in quitting games

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    We study quitting games and introduce an alternative notion of strategy profiles—absorption paths. An absorption path is parametrized by the total probability of absorption in past play rather than by time, and it accommodates both discrete-time aspects and continuous-time aspects. We then define the concept of sequentially 0-perfect absorption paths, which are shown to be limits of Δ-equilibrium strategy profiles as Δ goes to 0. We establish that all quitting games that do not have simple equilibria (that is, an equilibrium where the game terminates in the first period or one where the game never terminates) have a sequentially 0-perfect absorption path. Finally, we prove the existence of sequentially 0-perfect absorption paths in a new class of quitting games
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