Economics: Current climate models are grossly misleading : Nature News & Comment
Well, now even Nicholas Stern is joining in on the "economic modelling we've been using for climate effects is almost certainly a crock for being too optimistic" line.
Seems a bit late for that now, doesn't it? He should have been arguing that about 10 years ago, and just saying something like this: "Ha! you expect us to be able to calculate the effect of climate change of various types and uncertain extremity on GDP in 100 years time? Forget it. There's obvious potential for massive damage to humanity and its built and natural environment: you just need to get urgent policies into place to get CO2 down now."