Many countries have actively encouraged the production of biofuels as a low-carbon alternative to the use of fossil fuels in transportation. To what extent do these trends imply a reallocation of scarce land away from food to fuel production? This paper critically reviews the small but growing...

We study how environmental regulation in the form of a cap on aggregate emissions from a fossil fuel (e.g., coal) interacts with the arrival of a clean substitute (e.g., solar energy). The cost of the substitute is assumed to decrease with cumulative use because of learning-by-doing. We show...

Can nuclear power, which is carbon free, solve the global warming problem? It is a tough sell in the advanced countries, but many new nuclear power plants are under construction in the developing world. We develop an empirical Hotelling model that accounts for the limited stock of uranium,...