What Is the Causal Connection Between Free Market Policy and Slow Growth?

"This is perhaps the toughest question you've asked me on all the interviews I've done with you," he says. "I did say that the reason I took his measurement seriously was that that was the only part of his book, part of his argument where at least I could say that's an attempt at measuring something." He claims free market economists were sounding off a little bit more than usual and then we got poorer growth, so therefore one must have caused the other.