Voluntary agreements with industries: Participation incentives with industry-wide targets

We consider a policy environment in which an entire industry is faced with possible imposition of an emissions tax if environmental goals are not met voluntarily. We develop a multiple-firm model of pollution abatement in this context. Using the concept of a self-enforcing equilibrium, we examine the free-riding incentive of individual firms and its impact on the viability of the voluntary approach. We find that, despite the free-riding problem, a sub-group of firms have an incentive to participate in the VA. The VA is strictly preferred by the industry as a whole, although it is not cost minimizing.