Because of difficulties measuring pollution, many prior papers suggest a subsidy to some observable method of reducing pollution. We take three papers from the Journal of Environmental Economics and Management as examples, and we extend them to make an additional important point. In each case,...

This paper builds two simple general equilibrium models to demonstrate the equivalence between the Pigovian tax and the combination of a presumptive tax and an environmental subsidy. A presumptive tax is a tax that is imposed under the presumption that all production uses a dirty technology or...