Social and Economic Networks
Coalitional affinity games and the stability gap
IJCAI'09 Proceedings of the 21st international jont conference on Artifical intelligence
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In this paper we introduce and analyze social distance games, a family of non-transferable utility coalitional games where an agent's utility is a measure of closeness to the other members of the coalition. We study both social welfare maximisation and stability in these games from a graph theoretic perspective. We investigate the welfare of stable coalition structures, and propose two new solution concepts with improved welfare guarantees. We argue that social distance games are both interesting in themselves, as well as in the context of social networks.