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- W2952551823 abstract "Different types of dynamics have been studied in repeated game play, and one of them which has received much attention recently consists of those based on no-regret algorithms from the area of machine learning. It is known that dynamics based on generic no-regret algorithms may not converge to Nash equilibria in general, but to a larger set of outcomes, namely coarse correlated equilibria. Moreover, convergence results based on generic no-regret algorithms typically use a weaker notion of convergence: the convergence of the average plays instead of the actual plays. Some work has been done showing that when using a specific no-regret algorithm, the well-known multiplicative updates algorithm, convergence of actual plays to equilibria can be shown and better quality of outcomes in terms of the price of anarchy can be reached for atomic congestion games and load balancing games. Are there more cases of natural no-regret dynamics that perform well in suitable classes of games in terms of convergence and quality of outcomes that the dynamics converge to? We answer this question positively in the bulletin-board model by showing that when employing the mirror-descent algorithm, a well-known generic no-regret algorithm, the actual plays converge quickly to equilibria in nonatomic congestion games. Furthermore, the bandit model considers a probably more realistic and prevalent setting with only partial information, in which at each time step each player only knows the cost of her own currently played strategy, but not any costs of unplayed strategies. For the class of atomic congestion games, we propose a family of bandit algorithms based on the mirror-descent algorithms previously presented, and show that when each player individually adopts such a bandit algorithm, their joint (mixed) strategy profile quickly converges with implications." @default.
- W2952551823 created "2019-06-27" @default.
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- W2952551823 date "2016-05-25" @default.
- W2952551823 modified "2023-10-16" @default.
- W2952551823 title "Generalized Mirror Descents in Congestion Games" @default.
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- W2952551823 doi "https://doi.org/10.48550/arxiv.1605.07774" @default.
- W2952551823 hasPublicationYear "2016" @default.
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