The Kyoto Protocol aims to stabilize the concentration of carbon in the atmosphere, which is mainly caused by the burning of nonrenewable resources such as coal in power generation. We ask how a ceiling on the stock of emissions may a.ect the textbook Hotelling model. We show that when the...

Biofuels have received a lot of attention as a substitute for gasoline in transportation. They have been blamed universally for recent increases in world food prices. Both the United States and the European Union have adopted mandatory blending policies that require a sharp increase in their...