So, after shunning debate and the like, Paul Krugman finally admits that Robert Murphy exists, although I hardly think that what Murphy wrote constituted as "puerile insults." Yes, this comes from a person who mocks people who disagree with him as "zombies." No immaturity there.
The article to which Krugman refers is this one on capital theory, something that is missing from Krugman's Keynesian analysis as well as from the old Chicago School. (In their view, capital magically appears, as economists simply can assume it into existence. Don't try this at home.)
I think that Krugman and Murphy can argue this on their own without any help from me. Here is Murphy's post on his own blog regarding Krugman's post. Read and enjoy.
(I am back from speaking to the Gulf Coast Economics Club in Pensacola. A great time was had by all, and now it is time to get to work at my day job.)