We impute a global social welfare function that is consistent with the burden sharing in the Kyoto Protocol and in two proposals for a post-Kyoto treaty. The Kyoto Protocol favored the EU. The Frankel proposal for a post-Kyoto treaty continues the favorable treatment of the EU, while the EU...

Rich countries have emitted most of the greenhouse gases in the atmosphere, while poor countries will suffer most from climate change. Rich countries have therefore committed to help poor countries adapt. However, this is financed from the general development budget, and hence may do more harm...

Previous versions of the FUND model assumed, like many integrated assessment models, that the carbon cycle is independent of climate change. I here introduce a feedback through which warming leads to higher net emissions. This increases the atmospheric concentration of carbon dioxide in the year...

I study the feasibility of stringent targets for stabilizing ambient greenhouse gas concentrations. Climate policy has diminishing returns, and there is therefore a maximum to what can be achieved. The success of climate policy is hampered if the terrestrial biosphere turns from a carbon sink to...