Freise D, Schmitz H, Westphal M. Late-Career Unemployment and Cognitive Abilities. Journal of Health Economics. 2022;86. doi:https://doi.org/10.1016/j.jhealeco.2022.102689

Westphal M, Kamhöfer DA, Schmitz H. Marginal College Wage Premium under Selection into Employment. Economic Journal. 2022;132(646):2231-2272. doi:10.1093/ej/ueac021

Schmitz H, Westphal M. The Dynamic and Heterogeneous Effects of Retirement on Cognitive Decline. Vol 918. RWI - Leibniz-Institut für Wirtschaftsforschung, Ruhr-University Bochum, TU Dortmund University, University of Duisburg-Essen; 2021.

Kamhöfer DA, Schmitz H, Westphal M. Heterogeneity in Marginal Non-Monetary Returns to Higher Education. Journal of the European Economic Association. 2019;17(1):205-244. doi:10.1093/jeea/jvx058

Schmitz H, Westphal M. Informal Care and Long-term Labor Market Outcomes. Journal of Health Economics. 2017;56:1-18. doi:10.1016/j.jhealeco.2017.09.002

Schmitz H, Westphal M. Short-and medium-term effects of informal care provision on female caregivers’ health. Journal of Health Economics. 2015;42:174-185. doi:10.1016/j.jhealeco.2015.03.002