I was a late comer to that thread, so I'll repeat here the challenge I made there ( http://news.ycombinator.com/item?id=657364 ): Can anyone tell me what exactly Krugman said about trade theory that was both a) novel and b) true?

Krugman is popular for the following reasons a) he belonged to the right social networks b) he's a very good writer and c) he's a very good at defending of policies progressives want to believe in.