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arXiv 1003.3131cs.GTcs.DScs.MA
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成本分担博弈中的战略合作

Strategic Cooperation in Cost Sharing Games

Martin Hoefer

摘要:

在本文中,我们考虑战略成本分担游戏与所谓的任意共享的基础上各种组合优化问题,如顶点和集覆盖,设施位置,网络设计问题。我们专注于强均衡的存在性和计算复杂性,其中没有联盟可以提高其每个成员的成本。我们的主要结果揭示了战略博弈中的强均衡与经济学中传统的联盟成本分担博弈中的核心之间的联系。对于集覆盖和设施位置游戏,这导致在一个严格的强平衡的存在性的特征,使用合适的线性规划公式的完整性差距。此外,它允许通过一个统一的方法来获得所有现有的结果,在网络设计成本共享游戏的强平衡任意共享。此外,我们能够证明,一般来说,无政府状态的强无政府代价总是1。这应该与纳什均衡的无政府状态的无政府代价Θ(n)形成对比。最后,我们指出,LP方法也可以用来计算近最优和近稳定的近似强平衡。

英文摘要:

In this paper we consider strategic cost sharing games with so-called arbitrary sharing based on various combinatorial optimization problems, such as vertex and set cover, facility location, and network design problems. We concentrate on the existence and computational complexity of strong equilibria, in which no coalition can improve the cost of each of its members. Our main result reveals a connection between strong equilibrium in strategic games and the core in traditional coalitional cost sharing games studied in economics. For set cover and facility location games this results in a tight characterization of the existence of strong equilibrium using the integrality gap of suitable linear programming formulations. Furthermore, it allows to derive all existing results for strong equilibria in network design cost sharing games with arbitrary sharing via a unified approach. In addition, we are able to show that in general the strong price of anarchy is always 1. This should be contrasted with the price of anarchy of Θ(n) for Nash equilibria. Finally, we indicate that the LP-approach can also be used to compute near-optimal and near-stable approximate strong equilibria.

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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