Bloomberg View columnist Barry Ritholtz interviews Paul Wilmott, the financial consultant specializing in derivatives, risk management and quantitative finance. He has worked with many leading U.S. and European financial institutions and has written several books, including the recent "The Money Formula: Dodgy Finance, Pseudo Science, and How Mathematicians Took Over the Markets." Wilmott really wants you to know his feelings about quantitative models -- he calls them the “engine room of both the global economy and its most recent meltdown.”