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Krugman is pretty ticked off at conservative historian-for-hire Niall Ferguson for a "plain misrepresentation of the facts, with an august publication letting itself be used to misinform readers." He wonders if Newsweek will call for an apology. (Yeah, I'm sure it's coming right up.)

In the past, Krugman has called the Harvard professor a "poseur" who, when it comes to economics, "hasn't bothered to understand the basics, relying on snide comments and surface cleverness to convey the impression of wisdom. It's all style, no comprehension of substance."

I have to agree. Ferguson's area of expertise is history, but frequently opines on economics, and has a long-standing feud with Krugman. As anyone who follows his frequent pronouncements knows, Ferguson is frequently wrong - and I haven't seen an apology yet. (Fun trivia fact: The Times reports that Ferguson encouraged Paul Ryan to run for president!)