There's a post by Robin Hanson ("http://hanson.gmu.edu/econofsf.html" http://hanson.gmu.edu/econofsf.html") that discusses this issue with more references on th

There's a post by Robin Hanson ("http://hanson.gmu.edu/econofsf.html" http://hanson.gmu.edu/econofsf.html") that discusses this issue with more references on the topic (including the Krugman article).