This study analyses the determinants of the rate of temporary employment in 15 advanced economies using both macro-level data drawn from the OECD and EUROSTAT databases, as well as micro-level data drawn from the eighth wave of the European Household Panel. Comparative analysis is set out to test different explanations originally formulated for the Spanish case. The evidence suggests that the overall distribution of temporary employment in the analysed countries does not seem to be explicable by the characteristics of national productive structures. This evidence seems at odds with previous interpretations based on segmentation theories. As an alternative explanation, two types of supply-side factors are tested: crowding-out effects and edu...