We study three necessary conditions for work sharing to increase employment. First, there must exist a negative long-run relation between working time and employment. Second, hours per worker must be exogenous with respect to wages and employment. Third, policy makers must be able to influence...

Many comparisons of the performance of public and private producers use a public/private ownership dummy variable to capture cost differences in cross section data. This is appropriate if the producer choice is random. The dummy variable model is, however, logically inconsistent if the producer...