 What is the most accurate paraphrase of Paul Krugman’s reply to John Cassidy?
Krugman's Life of Brian Where it all started: Paul Krugman's "The Legend of Arthur." Letter from John Cassidy Paul Krugman replies to John Cassidy Letter from M. Mitchell Waldrop Paul Krugman replies to M. Mitchell Waldrop Letter from Kenneth J. Arrow Letter from Ted C. Fishman David Warsh's July 3, 1994, Boston Globe Letter from John Cassidy: Paul Krugman loves to berate journalists for their ignorance of economics, particularly his economics, but on this occasion, I fear, his logic is more addled than usual. I am reluctant to dignify his hatchet job with a lengthy reply, but some of his claims are so defamatory that they should be addressed, if only for the record. 1) Krugman claims that my opening sentence--"In a way, Bill Gates's current troubles with the Justice Department grew out of an economics seminar that took place thirteen years ago, at Harvard's John F. Kennedy School of Government"--is "pure fiction." Perhaps so, but in that case somebody should tell this to Joel Klein, the assistant attorney general in charge of the antitrust division. When I interviewed Klein for my piece about the Microsoft case, he singled out Brian Arthur as the economist who has most influenced his thinking about the way in which high-technology markets operate. It was Klein's words, not those of Arthur, that prompted me to use Arthur in the lead of the story. 2) Krugman wrote: "Cassidy's article tells the story of how Stanford Professor Brian Arthur came up with the idea of increasing returns." I wrote no such thing, and Arthur has never, to my knowledge, claimed any such thing. What I did say in my article was that increasing returns was largely ignored by mainstream economists for much of the postwar era, a claim that simply isn't controversial. (As Krugman notes, one reason for this was technical, not ideological. Allowing for the possibility of increasing returns tends to rob economic models of two properties that economists cherish: simplicity and determinism.
 “David Warsh is a journalist who did it right.”
 “I disagree with you.”  “Your article was better than David Warsh’s.”  “My article was a necessary contribution to the research.”  “David Warsh is a journalist who did it right.”