The information economy : definition and measurement
This report series defines and measures the "information activity" within the national economy. "Information activity" is defined to include those specific industries and occupations whose primary function is to produce, process or transmit economically valuable information. Changes in the national labor force are analyzed over a 120-year span. Information activities have grown dramatically over the last several decades, until they employed 46% of the labor force in 1970. National Income and Product accounts are analyzed to determine the contribution of the information activities to wages and capital expenditures . Information workers earned 53% of total wages in 1970; 46% of value added was derived from information activities in 1967. Input-Output tables have been constructed which show the detailed structure of the information economy
Print Book, English, 1977
U.S. Dept. of Commerce, Office of Telecommunications, Washington, 1977