We give an axiomatization of the aspiration core on the domain of all TU-games using a relaxed feasibility condition, non-emptiness, individual rationality, and generalized versions of the reduced game property (consistency) and superadditivity. Our axioms also characterize the C-core...

The paper illustrates a new methodology for deriving the feasibility constraints of the core and the aspiration core, a non-empty core-extension, from other axioms. The two solution concepts differ only in the implicit rules that govern coalition formation. Our characterizations derive those...