A review of the measures of the stock of human capital used in empirical growth research reveals that human capital is mostly poorly proxied. The simple use of the most common proxy, average years of schooling of the working-age population, misspecifies the relationship between education and the...

This paper is based on my thesis from the year 2008. It uses the German Microcensus (MC) to study the effects of continuing vocational training (CVT) on employment, the risk of unemployment, and wages. To control for education, profession and heterogeneity in the sectors and industrial branches...

We employ a combination of school fixed effects and IV estimation to estimate the effect of class size on student performance in 18 countries. Using the random part of the class-size variation between two adjacent grades within individual schools allows us to identify causal class-size effects....