@articleKamhöfer_Schmitz_Westphal_2019, title=Heterogeneity in Marginal Non-Monetary Returns to Higher Education, volume=17, DOI=10.1093/jeea/jvx058, number=1, journal=Journal of the European Economic Association, author=Kamhöfer, Daniel A and Schmitz, Hendrik and Westphal, Matthias, year=2019, pages=205–244