Since the mid-1960's the Netherlands has had an immigration surplus, mainly because of manpower recruitment from Turkey and Morocco and immigration from the former Dutch colony of Surinam. Immigrants have a weak labor market position, which is related to their educational level and language...

For various reasons the relationship between age and productivity is a matter of policy concern. I present new empirical research showing how productivity is affected by age. I study age effects at the individual level by analyzing data on running and publishing in economic journals. Furthermore...