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Early professional life
From 1927 to 1930, he worked at the Institute for the World Economy of the University of Kiel. There he researched the derivation of statistical demand and supply curves. In 1929, he traveled to China to assist its ministry of railroads as an advisor.
In 1931, he went to the United States and was employed by the National Bureau of Economic Research.
During World War II, Leontief served as consultant at the U. S. Office of Strategic Services.[citation needed]
Affiliation with Harvard
Leontief joined Harvard University's department of economics in 1932 and in 1946 became professor of economics there.
In 1949, Leontief used an early computer at Harvard and data from the U.S. Bureau of Labor Statistics to divide the U.S. economy into 500 sectors. Leontief modeled each sector with a linear equation based on the data and used the computer, the Harvard Mark II, to solve the system, one of the first significant uses of computers for mathematical modeling,[10][11][12][13] along with George W. Snedecor's usage of the Atanasoff–Berry computer.
Leontief set up the Harvard Economic Research Project in 1948 and remained its director until 1973. Starting in 1965, he chaired the Harvard Society of Fellows.
Affiliation with New York University
In 1975, Leontief joined New York University and founded and directed the Institute for Economic Analysis. He taught graduate and undergraduate classes.
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