Podcast:EconTalk Published On: Mon Oct 27 2008 Description: Mike Munger of Duke University talks with EconTalk host Russ Roberts about the often-vilified middleman--someone who buys cheap, sells dear and does nothing to improve the product. Munger explains the economic function of arbitrage using a classic article about how prices emerged in a POW camp during World War II. Munger then applies the analysis to the financial crisis.