Most people would agree that it makes sense to tax a company that pollutes in a way that directly reflects the amount of environmental and social damage it has done. Yet in practice, such taxes are fraught with difficulty and have far-reaching implications. A company facing a new tax may lay off...

We explore the effects of environmental taxes that imprecisely target pollution. A review of actual policies indicates few (if any) examples of a true tax on pollution. More typically, environmental taxes target an input or output that is correlated with pollution. We construct a simple...

Cap and trade systems are emerging as the front-running policy choice to address climate change concerns in many countries. One of the apparent attractions of this approach is the ability to achieve hard limits on emissions over a control period. The cost of achieving this certainty on emission...