Abstract:
We study optimal growth and its decentralization in an overlapping generations model. The decentralization of an optimal path needs some specific taxes in addition to lump-sum transfers if there are externalities. The introduction of market of permits allows neutralizing the external environmental effects. We shows that there is a unique management of permits such that the equilibrium coincides with the optimal path : all permits should be auctioned i.e. no permits to firms. This conclusion is in contradiction with the usual pratice of grandfathering.