资源论文Stable and Envy-free Partitions in Hedonic Games

Stable and Envy-free Partitions in Hedonic Games

2019-09-26 | |  86 |   46 |   0 0 0
Abstract In this paper, we study coalition formation in hedonic games through the fairness criterion of envyfreeness. Since the grand coalition is always envyfree, we focus on the conjunction of envy-freeness with stability notions. We first show that, in symmetric and additively separable hedonic games, an individually stable and justified envy-free partition may not exist and deciding its existence is NPcomplete. Then, we prove that the top responsiveness property guarantees the existence of a Pareto optimal, individually stable, and envy-free partition, but it is not sufficient for the conjunction of core stability and envy-freeness. Finally, under bottom responsiveness, we show that deciding the existence of an individually stable and envy-free partition is NP-complete, but a Pareto optimal and justified envy-free partition always exists

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