Here's one trashy, insinuating post from Forbes Magazine, a fanzine for bis-ad wannabe millionaires.    https://www.forbes.com/sites/ralphbenko/2014/07/14/is-paul-krugman-leaving-princeton-in-quiet-disgrace/#96fc078766f2

Forbes notoriously hates Paul Krugman, likely for Krugman's liberal bent. This piece is nothing but a trashy hit piece, and Forbes is 75% a trashy billionaire worshipping money porn magazine. But CMD probably won't reveal his source, or doesn't know how to cite and link.