Here’s a treat for those of you, like me, who are interested in economic theory. (I know, I’m a bit of a geek.) My favorite economics teacher, Russ Roberts, who’s at George Mason U. and the Hoover Institution, has put together a rap video with a Spike TV producer named John Papola that, believe it or not, illustrates the debate between free-market economist F.A. Hayek and macro-economist John Maynard Keynes. You may have heard about it on Planet Money or NPR’s All Things Considered. Russ is a multi-media threat–he’s written a “economic romance” novel called The Invisible Heart, he hosts a terrific podcast called EconTalk and now he’s branched into video. Last time I looked, some 250,000 people had watched this on YouTube. Enjoy!