I like Paul Romer, and found some merit in his earlier critique of the "mathiness" of modern economics. But I was disappointed with his recent critique of economics (part of a book review), which appeared in Foreign Policy. David Henderson has identified one problem---Romer's desire to expel economists who he sees as biased. (Romer's comments on this issue are a bit hard to interpret, but that's hardly much of a defense.) Here I'd like to focus on the core of...