Regular commenter Derrida Derrider (double-D) draws my attention to the fact that Daniel Davies (D-squared) has posted the third part of his review of Freakonomics.Â
Derrida likes Daniel’s review. I wasn’t so enamoured. Much of it is about the problems that can arise from using instrumental variables. Yet rather than being directed at particular papers of Levitt’s, it’s mostly a broad-brush ‘these are the kinds of mistakes he makes’ posting. I kept waiting for a killer example, the moment when Daniel would tell me about crucial error that both Steve and the referees at the AER/QJE/JPE had missed. But it never came.