An empirical analysis is conducted on two panels of 18 OECD countries to test whether the elasticity of hourly productivity to working time is negative and decreasing with working time itself. If so, the decreasing returns on working time could be indicative of a fatigue effect that increases...

Hourly labour productivity levels in a number of European countries are thought to be very close to, or possibly even higher than the level 'observed' in the United States. At the same time, however, there are big differentials between hours worked and/or employment rates in these countries and...