TANNENBAUM, FRANK (1893–1969), U.S. economic historian. Born in Austria, Tannenbaum was taken to the United States in 1905. He was a member of the research staff of the Institute of Economics in Washington (1925) and subsequently made economic and social surveys of Puerto Rico (1928–30) and Mexico (1931). In 1939 he was appointed professor of history at Columbia, where he taught economic history until his retirement in 1961. Tannenbaum's numerous writings include: Peace by Revolution (1933), Crime and the Community (1937), Mexico: The Struggle for Peace and Bread (1950), and Ten Keys to Latin America (1962).