By Bruce Caldwell Friedrich Hayek, Nobel-prize winning economist and well-known proponent of free markets, is having a big month. He was last seen rap-debating with John Maynard Keynes in the viral video above, (in which Hayek is portrayed as the sober voice of reason while Keynes overindulges at a party at the Fed). His 1944 book, "The Road to Serfdom," provided the theme for John Stossel's Fox Business News program on Valentine's Day. Hayek, who died in 1992, is also reemerging as a bestsell...