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Economist, Interrupted

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First-magnitude stars of the generation of economists who began their work in the 1970s include Paul Krugman, Paul Romer, Lawrence Summers, Jeffrey Sachs, and, a late bloomer, Ben Bernanke. It was Romer, 59, of New York University, who made a little news earlier this month at the economists’ meetings in Boston when, at a session designed to showcase various contributions to “new growth theory,”  his own and others’, he turned to Robert Lucas and denounced Lucas’s “mathiness” in the matter. Lucas, 77, of the University of Chicago, who, thirty years before, had put Romer in business, and one of the