This paper estimates the health returns to education, using data on identical twins. I adopt a twin-differences strategy in order to obtain estimates that are not biased by unobserved family background and genetic traits that may affect both education and health. I further investigate to what...

Estimates of the effect of education on GDP (the social return) have been hard to reconcile with micro evidence on the private return to schooling. We present a simple explanation combining two ideas: imperfect substitution and endogenous skill-biased technological progress and use cross-country...

This discussion paper resulted in a publication in the 'Journal of Business Venturing', 2014, 29(5), pages 612-632.<P> Human capital obtained through education has been shown to be one of the strongest drivers of entrepreneurship performance. The entrepreneur's human capital is, though, only one of...</p>

We argue that promoting education may be a means to reduceincome inequality. When workers of different skill levels areimperfect substitutes in production, an increase in the level ofhuman capital in the economy reduces the return to education.Hence, a given compression of after-tax incomes can...

Forthcoming in the <I>International Journal of Population Research</I>, Vol. 2012.<P> Using two Dutch labour force surveys, employment assimilation of immigrants is examined. We observe marked differences between immigrants by source country. Non-western immigrants never reach parity with native Dutch....</p></i>

This meta-analytical review of empirical studies of the impact of schooling on entrepreneurship selection and performance in developing economies looks at variations in impact across specific characteristics of the studies. A marginal year of schooling in developing economies raises enterprise...

Understanding of the substantial disparity in health between low and high socioeconomic status (SES) groups is hampered by the lack of a suffciently comprehensive theoretical framework to interpret empirical facts and to predict yet untested relations. We present a life-cycle model that...

This discussion paper resulted in a publication in the 'International Small Business Journal' (2013). Volume 31, issue 1, pages 23-33.<P> Education is argued to be an important driver of the decision to start a business. The measurement of its influence, however, is difficult since it is considered...</p>

This discussion paper was published in the <I> Economics of Education Review</I> (2012). Vol. 31(5), 515-523.<P> The validity of family background variables instrumenting education in income regressions has been much criticized. In this paper, we use data of the 2004 German Socio-Economic Panel and...</p></i>