Taleb (above) also, on October 19th, put his response to Krugman's dissing of Gould in twitter form: "How econ models fragilize (or how Krugman blames others yet does not understand much risk & economics)." Daniel Davies then took up the twittering cudgels on behalf of Krugman, telling Taleb "your stuff always has one or two things in in that just can't be stood up." Tweet fight! A wonky tweet fight about economic and evolutionary theory, but a tweet fight still. It came to my attention through Salmon's column, here . And with that, I have said most of what I want to say on all this, except for three points: who is Daniel Davies? how much of a Ricardian is Krugman really? and, where do I stand on the underlying Krugman/Taleb debate over trade? 1. Davies? I don't know. His twitter account has nearly 3,000 followers, though. 2. Krugman and Ricardo. Here I admit my earlier reference was rather slighting. I said Friday that Krugman a...