Megan McArdle has a generally sensible post on the main issues, though I disagree on some points as I note in comments, and I still don’t see that this has any bearing on the rights and wrongs of abortion (except relative to the obviously silly position that we are morally obliged to have as many children as possible).
Arnold Kling makes it clear that he doesn’t understand the mathematics of discounting. The first comment, by Michael Sullivan gets it right,
but there’s no response or correction so far from Kling. Kling has now corrected his post.
James Annan links to this piece by Paul Baer,. Baer puts the view (with which I have some sympathy) that Stern underestimates the costs of the melting of the Arctic ice cap, which could happen even with stabilisation at 550ppm.
I definitely need to come back to the issue of the costs of global warming. My general view is that, while Stern’s choice of discount rate is at the low end, the Review badly underestimates the social cost of the damage to natural ecosystems that will inevitably arise from global warming.