The role of human capital has so far not been well documented at the macroeconomic level. Many empirical studies lack a consistent theoretical foundation and there are measurement problems due to a very narrow concept of human capital focusing on formal education. Future empirical research...

Despite abundant microeconomic level evidence, the role of human capital in economic development has not been well documented at the macroeconomic level. Up to now, many empirical macro studies lack a consistent theoretical foundation. In addition, the wide range of published results seems to...

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...