, seminar participants at the University of Zurich, participants of the 21 st Colloquium on Personnel Economics in Munich, participants of the annual meeting of the Bildungsökonomischer Ausschuss des Vereins für Socialpolitik in Bern, participants of the 18 th International Labour and Employment Relations Association World Congress in Seoul, participants of the 3 rd Centre for Vocational Education Research Conference in London, and participants of the Conference on VET Research in Lausanne for helpful comments. We also thank Natalie Reid for language consulting and the Swiss Federal Statistical Office for data provision of the Swiss Earnings Structure Survey (contract number 160683 Ref. 431.10-1), the Business Census (contract number 180096 Ref. 511.0-1, used in the Online Appendix), and the Survey of Higher Education Graduates (contract number 160410 Ref. 662.410-1, used in the Online Appendix). Furthermore, this paper benefited from very helpful comments by the editor at Labour Economics, Michele Pellizzari, and two anonymous reviewers. This study is partly funded by the State Secretariat for Education, Research and Innovation (SERI) through its Leading House on the Economics of Education, Firm Behavior and Training Policies.