International environmental agreements with social externalities: A global emission game with asymmetric players

In this work we present a Global Emission Game with N asymmet- ric players, in which the pay-o of cooperators is aected by a Social Externalities, that we assume to be a positive function. We refer to the notion of self-enforcing agreements to study the stability of the coali- tion and we assume that the N players are divided in two homogeneous groups, developed and developing countries. Moreover, the externali- ties doesn't depend on emissions, but only on the number of players in coalition. So, it has no eects on the choice of optimal emissions, but only on the stability of the coalition.