Martin Stuart Feldstein ( ; November 25, 1939 – June 11, 2019) was an American economist. He was the George F. Baker Professor of Economics at Harvard University and the president emeritus of the National Bureau of Economic Research (NBER). He served as president and chief executive officer of the NBER from 1978 to 2008 (with the exception of 1982 to 1984). From 1982 to 1984, Feldstein served as chairman of the Council of Economic Advisers and as chief economic advisor to President Ronald Reagan (where his deficit hawk views clashed with the Reagan administration's large military expenditure policies). Feldstein was also a member of the Washington-based financial advisory body the Group of Thirty from 2003. Early life and education Feldstein was born in New York City to a Jewish family and graduated from South Side High School in Rockville Centre, New York. He completed his undergraduate education at Harvard University (AB, summa cum laude, 1961), where he was affiliated with Adams House, and then attended Nuffield College, Oxford (B.Litt., 1963; M.A., 1964; D.Phil., 1967). He was a Research Fellow there from 1964 to 1965, an Official Fellow from 1965 to 1967 and was later an Honorary Fellow of the College. Career In 1977, he received the John Bates Clark Medal of the American Economic Association, a prize which was awarded every two years until 2010 when it began to be awarded yearly. It is awarded to the economist under the age of 40 who is judged to have made the greatest contribution to economic science. That same year, he was elected to the American Academy of Arts and Sciences. In 1989, he was elected to the American Philosophical Society. He was among the ten most influential economists in the world, according to IDEAS/RePEc. He was the author of more than 300 research articles in economics and made contributions to health economics, international economics, and the economics of national security. However, he was known primarily for his greater contributions to macroeconomics, public finance and social insurance. Pioneering much of the research on the working mechanism and sustainability of public pension systems, he advanced the current understanding of the effects of social insurance. Feldstein was an avid advocate of Social Security reform and was a main driving force behind former President George W. Bush's initiative of partial privatization of the Social Security system. Aside from his contributions to the field of