France has experienced massive changes in its regulation of working time during the last decade. These changes generate natural experiments that may help to study a variety of issues in labor economics, including work sharing effect on job creation or productivity, labor relations or adaptation...

The literature on enterprises in Sub-Saharan Africa provides evidence that there are significant differences between companies run by members of the majority population and those run by members of minorities. Differences are frequently related to size, age, and certain success indicators....