We first observe that two of Maskin's results do not extend beyond three players: we construct a four-player partition function with nonpositive externalities whose unique solution is inefficient, as well as a four-player characteristic function that has a unique efficient solution for each...

We consider an intertemporal game-theoretic framework in which different coalitions interact repeatedly over time. Both the terms of trade and the endogenous cooperation structure arising in this setup are characterized, in a protocol-free manner, when just three natural conditions are...