When government needs more revenue than is available from a pollution tax rate equal to marginal environmental damage, our intuition tells us to raise the tax on the clean good above zero and to raise the tax on the dirty good above that first-best Pigouvian rate. Yet new results suggest that...

The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980 follows the "polluter pays" principle by placing retroactive liability on responsible firms. Yet this cost is borne by current shareholders who did not benefit from past low-cost waste management. This...

Mobile sources contribute large percentages of each pollutant, but technology is not yet available to measure and tax emissions from each vehicle. We build a behavioral model of household choices about vehicles and miles traveled. The ideal-but-unavailable emissions tax would encourage drivers...