As human societies grapple with the scarcity of environmental resources—clean water, biodiversity, and atmospheric quality—environmental markets will achieve an important role in the global economy. Along with markets for knowledge, they may become the most important institutions in the...

I distinguish between reduction offsets and removal offsets, the former generated by a reduction in the rate of greenhouse gas emissions and the latter generated by the removal of greenhouse gases from the atmosphere. I show that only removal offsets make any contribution to mitigating climate...

This paper studies countries' incentives to develop advanced pollution abatement technology when technology may spillover across countries and pollution abatement is a global public good. We are motivated in part by the problem of global warming: a solution to this involves providing a global...