I was just going to write a post about David Autor as the "weighted average of most important yet most neglected economist for the blogosphere," or something like that. Yet Paul Krugman just did essentially that. In my view it is one of Krugman's best posts.
This may sound strange, but to think through these issues I spend some time playing chess against a computer, and also allied with a computer. It beats me, but I learn a lot from the experience and I'll be reporting on that.