Uncertainty is ubiquitous in environmental economics: the field studies interactions between socio-economic and biogeochemical systems and neither is fully understood. So our grasp of their interactions is necessarily limited. We argue that this pervasive uncertainty is best modeled as ambiguity...

Common integrated assessment models produce the counterintuitive result that higher risk aversion does not lead to stronger near-term abatement. This paper re-examines this result with a DICE model that is fully coupled with a thermohaline circulation model. It also features Epstein-Zin utility...

We present a meta-regression analysis of the relation between the concentration of carbon dioxide in the atmosphere and changes in global temperature. The relation is captured by "climate sensitivity", which measures the response to a doubling of carbon dioxide concentrations compared to...