Thomas J. Sargent
Thomas John "Tom" Sargent (born July 19, 1943) is an American economist, specializing in the fields of macroeconomics, monetary economics and time series econometrics. As of 2014, he ranks fourteenth among the most cited economists in the world. He was awarded the Nobel Prize in Economics in 2011 together with Christopher A. Sims "for their empirical research on cause and effect in the macroeconomy".