In 2009, the Obama Administration entered office in the midst of a serious economic recession. Nonetheless, one of its priorities was to address the problem of climate change. It ultimately did a great deal -- producing, with the aid of market forces, significant reductions in greenhouse gas...

It is increasingly clear that the world would be better off with an international agreement to control greenhouse gas emissions. What remains poorly understood is that the likely costs and benefits of emissions controls are highly variable across nations. Most important, prominent projection...

If one nation damages another, what are its obligations? This question can be approached and understood in diverse ways, but it is concretized in debates over the social cost of carbon, which is sometimes described as the linchpin of national climate policy. The social cost of carbon, meant to...