51�Թ�

An Economic Model “Further development of input-output analysis and the realization of its potentialities for informed and rational decision-making at all levels of economic life call for detailed and more up-to-date tables. Comparison of the 1947 and 1958 input-output tables for the U.S. economy indicates significant changes in the input-output coefficients arising from technological innovation. Work has now begun on the preparation of an input-output table for the U.S. economy based on the data from the census of manufactures for 1963.—Wassily W. Leontief”

Though such direct involvement in public issues is unusual for an academic economist, it flows quite naturally from Leontief's most important achievement: the development of "input-output" analysis.