The decline in average annual hours worked in the United States, 1947–1979

Using data from government agencies, a survey of 200 “Fortune 500” type companies, and data derived by the IRU, the average number of hours worked annually 1947–1979 was examined and found to have declined significantly. Because the workweek has remained stable and does not reflect the dramatic rise in paid time off since 1947, the workyear is now a more valid standard of measurement. To compensate for lost production hours, many firms have taken steps to raise the productivity of hours worked, including increased overtime and shift work, the introduction of automation and other technological advances, and flexible manufacturing systems.