See John, I knew* that bringing Gernot into the fold would pay huge dividends. From Paul Krugman's New York Time's blog:
Away from the headlines, there’s a really important discussion going on about how to think about the economics of climate change. The key player is Marty Weitzman, who has made a simple point (albeit using very, very difficult math) that’s nicely summarized at Env-Econ...
*I had absolutely nothing to do with Gernot joining us. But I'm glad I can use co-founders prerogative and claim to have thought of it.