Thomas John "Tom" Sargent (born July 19, 1943) is an Americaneconomist specializing in the fields of macroeconomics, monetary economics and time serieseconometrics. He is known as "one of the leaders of the rational expectations revolution" and the author of numerous path-breaking papers. Working with Neil Wallace, Sargent developed the saddle path stability characterization of the rational expectations equilibrium. He is considered to be among the most influential economists in the world.http://ideas.repec.org/top/top.person.all.html IDEAS/RePEc