Princeton prez Paul Krugman and Harvard prez Niall Ferguson are calling each other “poseurs," "whiners," and accusing the other of being “patronising” and having “verbal diarrhoea." What's the subject that turns Ivy League presidents into screaming little boys? Fortunately, it's something worth stomping your feet about: whether or not the economy is being helped or hurt by stimulus money. The fight started at a symposium, then took to the blogs, and while academics are famous for being petty about their fights, "it is a long time since the academic world witnessed a dispute as gladiatorial as this one," writes the London Times.