Robert H. Frank, Ben S. Bernanke ; with the assistance of Roger T. Kaufman. Robert H. Frank, Ben S. Bernanke ; with special contribution by Louis D. Johnston. Kathleen Stassen Berger ; with the assistance of Ross A. Thompson. Robert Gilpin, with the assistance of Jean M. Gilpin. Guillermo Segreda, James W. Harris, with the assistance of Robert G. Mowry.