Here's a talk I gave yesterday to CFA Ireland. I had a great time, and the discussion afterwards was enlightening and stimulating. Thanks very much to John and Joe for the invitation. A working paper version of the book chapter the talk is based on is here, and the book itself may be purchased here. The slides I gave are here. Thanks to Karl Deeter for videoing the talk (and the impromptu promotion to Professor-I'm afraid I'm still just a lecturer), and his insightful comments on fiscal policy in particular got me thinking about a new set of ideas on the train home.  The entire talk (and the comments given) are here, and a sample of the talk is below.