Observations on munition workers, most of them women, are organized to examine the relationship between their output and their working hours. The relationship is nonlinear: below an hours threshold, output is proportional to hours; above a threshold, output rises at a decreasing rate as hours...

It has become orthodox in economics research to interpret the association between hourly earnings and working hours as the expression of the preferences of workers. This convention originated in H. Gregg Lewis' explanation for the decline in hours of work since the nineteenth century. His...

For a century, two labor market empirical regularities characterized the movements of the hours of work, employment, and hourly compensation of American manufacturing production workers. They resembled conditional labor supply functions. Increases in employment substituted for reductions in...