A well established belief both in the game-theoretic IO and in policy debates is that market concentration facilitates collusion. We show that this piece of conventional wisdom relies upon the assumption of profit-seeking behaviour, for it may be reversed when firms pursue other plausible goals....

The aim of this paper is to discuss the role played by international institutions in achieving effective International Environmental Agreements. We emphasise the strategic nature of environmental negotiations and use a game theoretic model of coalitional bargaining to illustrate the main issues....

We model club formation as a non-cooperative game of coalition formation and surplus division. We show how social norms and individual rationality sustain a particular form of collective inefficiency, namely excessive entry in the joint production and exploitation of an excludable good. We term...