to the best aspect of each coalition, and is shown to be a sufficient conditaion for the existence of core stable … coalition structures. In this paper, we propose a new concept, called bottom refuseness, for modeling societies with … conservative players, i.e., each player pays more attention to the worst aspect of each coalition, and has tendency to choose among …

the efficient coalition structure is stable in terms of the coalition formation theory. It is assumed that coalitions can … coalitions) and a coalition may deviate if and only if it stands to gain from it. It is then shown that subsequent to a deviation … by a coalition, the nonmembers will have incentives to break apart into singletons, as is assumed in the definition of …

We investigate the computational complexity of several decision problems in hedonic coalition formation games and … either core stability or strict core stability is under consideration, the existence problem of a stable coalition structure … stable coalition structure and of an individually stable coalition structure turn out to be NP-complete in the strong sense. …