We wish to study optimal dynamic nonlinear income taxes. Do real world taxes share some of their features? What policy prescriptions can be made? We study a two period model, where the consumers and government each have separate budget constraints in the two periods, so income cannot be...

Regulators and academicians have recently become interested in using a marketable permits program as a new way to control aggregate pollution emissions. Our research focuses on choosing a permit trading mechanism that is both economically efficient and politically viable. We consider an...