I don’t know about that.
The article was posted at blogrunner.com where Krugman’s posts get published owed by the New York Times which I ahve provided by the first link and the second link has the story of Krugman discussing his bankruptcy.
Let me know if you still think it’s a hoax.
http://krugman.blogs.nytimes.com/2013/03/11/breitbarted/
Krugman from second link [emphasis mine]:I wanted to wait and see which right-wing media outlets would fall for the hoax.