David is the Vice President of the St. Louis Federal Reserve Bank, and has published widely in the field of monetary economics. He also writes for his blog, MacroMania, where he covers a multitude of economic topics. David joins the show today to discuss the economics behind the Phillips Curve, and to help provide a greater understanding of the debate surrounding it. They also discuss the mystery of low inflation in the United States, the excess money demand problem, and the important role debt plays within international monetary policy.