ABSTRACT: Observations on munition workers, most of them women, are organised to examine the relationship between their output and their working hours. The relationship is non-linear: below an hour’s threshold, output is proportional to hours; above a threshold, output rises at a decreasing rate as hours increase. Implications of this finding for the estimation of labour supply functions are considered. The findings also link up with the current research on the effects of long working hours on accidents and injuries.An earlier version is also available as Institute for the Study of Labor (IZA) discussion paper.
UPDATE: Also featured on The Economist's Free Exchange blog on December 9th: "Proof that you should get a life."