What is a feasible and efficient policy to regulate air pollution from vehicles? A Pigouvian tax is technologically infeasible. Most countries instead rely on exhaust standards that limit air pollution emissions per mile for new vehicles. We assess the effectiveness and efficiency of these...

"An NBER digest for this paper is available.Researchers estimating the demand for energy-using durable goods must specify consumers' beliefs about future energy prices. Policy-relevant inference hinges on this specification, yet there is little direct evidence on the nature of consumer beliefs....