We analyze a transboundary pollution control problem in a heterogeneous two-country differential game in which each country's regulator cares for the implications of environmental policy on its competitiveness. We characterize and compare the noncooperative and the cooperative solutions, showing...

We first study the optimality of a committed policy mix of tax and subsidy to control pollution when firms are involved in abatement technology R&D that is subject to knowledge spillovers. Then a comparison of tax and subsidy is provided when the policy mix is not available and the regulator can...