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arXiv 1602.02063cs.GTcs.MA
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论团体比赛中被支配者的力量

On the power of dominated players in team competitions

Kai Jin, Pingzhong Tang, Shiteng Chen

摘要:

我们研究了两支球队之间的多轮团队比赛,每支球队在每轮比赛中同时选择一名球员,每个球员最多只能打一次。比赛定义了一个具有完美回忆的扩展形式的游戏,可以通过标准方法有效地解决。我们感兴趣的是这个博弈的子博弈完美均衡的性质。我们首先证明了当没有多余的参与人时,一致随机策略是两个团队的子博弈完美均衡策略(即,每队参赛人数与比赛轮数相等)。第二,如果球队有多余的球员,并且球员的实力是可传递的,那么球队可以安全地放弃其弱势球员。然后,我们专注于更有趣的情况下,有多余的球员和球员的实力是不可传递的。在这种情况下,我们得到了几个违反直觉的结果。首先,一个参与者可能会帮助提高其团队的收益,即使它被整个其他团队所控制。我们给出了劣势局中人有用的一个必要条件。我们还研究了处于劣势的参与者可以在多大程度上增加收益。这些结果带来了见解,发挥和设计一般的团队比赛。

英文摘要:

We investigate multi-round team competitions between two teams, where each team selects one of its players simultaneously in each round and each player can play at most once. The competition defines an extensive-form game with perfect recall and can be solved efficiently by standard methods. We are interested in the properties of the subgame perfect equilibria of this game. We first show that uniformly random strategy is a subgame perfect equilibrium strategy for both teams when there are no redundant players (i.e., the number of players in each team equals to the number of rounds of the competition). Secondly, a team can safely abandon its weak players if it has redundant players and the strength of players is transitive. We then focus on the more interesting case where there are redundant players and the strength of players is not transitive. In this case, we obtain several counterintuitive results. First of all, a player might help improve the payoff of its team, even if it is dominated by the entire other team. We give a necessary condition for a dominated player to be useful. We also study the extent to which the dominated players can increase the payoff. These results bring insights into playing and designing general team competitions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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