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Robert J. Barro is Robert C. Waggoner Professor of Economics at Harvard University and a senior fellow of the Hoover Institution at Stanford University. About Robert Barro: "He has changed the way economists think about everything from the long-run effects of government deficits to the forces that favor economic growth." --Sylvia Nasar, New York Times Xavier Sala-i-Martin is Professor of Economics at Columbia University, and visiting professor at the University of Pompeu Fabra, Barcelona. |