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Sudhir Venkatesh, hooker economics expert, is back. Just yesterday he was on Slate saying New York governor Eliot Spitzer was caught with a call girl because he didn't pay enough. Today he's in the New York Times claiming that high-class hookers are imaginary — no matter how much they make, Venkatesh frets, the poor girls are all exploited, miserable and in physical danger. Is there really no one else to go to for expertise on the business? What about some of the high-end providers themselves — or has Venkatesh convinced reporters they don't exist? (Photo by jamesyu)