Permit markets lead polluting firms to purchase abatement goods from an eco-industry, which is often concentrated. This paper studies the consequences of imperfect competition in an eco-industry on the equilibrium choices of the competitive polluting firms. It then characterizes the second best...

In this article we introduce a polluting eco-industry. Depending on the level of the damage, we find one of two optimal equilibria. If the damage is low, we generalize the usual results of the economic literature to the polluting eco-industry: the dirty firm partially abates their emissions,...