What did Heckman say to Cochrane?

A summary of the controversy around the Milton Friedman Institute is in the David Warsh link here (maybe I shodul say something about my friend Hussein, but I don't have time now). A NYT article is here. Here is John Cochrane's summary of the controversy. BUT, the full text of the message from James Heckman to John Cochrane is here (need to go to the end of the article).

ADDENDUM
The last link may not always work. So, here it is: Heckman e-mailed Cochrane a terse response to his concerns: “Screw off, John,” he said.
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