A tweet by Kieran Healy about the Nobel Prize in Economics prompted an Op-Ed piece by Harvard’s Raj Chetty in the New York Times, and began a debate that Paul Krugman and others have since weighed in on.
Krugman II: http://krugman.blogs.nytimes.com/2013/10/22/a-dark-age-of-empirical-work/?_r=0