The received characterizations of feasible interim allocations are mostly in the spirit of Border (1991): Fix a family of sets, each containing some player-types, and test the interim allocation under consideration against all these sets. In the published literature, such Border-like...

The received characterizations of feasible interim allocations are mostly in the spirit of Border (1991): Fix a family of sets, each containing some player-types, and test the interim allocation under consideration against all these sets. In the published literature, such Border-like...

In this paper we characterize the optimal allocation mechanism for $N$ objects, (permits), to $I$ potential buyers, (firms). Firms' payoffs depend on their costs, the costs of competitors and on the final allocation of the permits, allowing for externalities, substitutabilities and...