The impact of hiring costs for skilled workers on apprenticeship training : a comparative study / Manuel Aepli (Swiss Federal University for Vocational Education and Training), Samuel Muehlemann (LMU Munich, IZA and ROA Maastricht), Harald Pfeifer (IZA, ROA Maastricht and BIBB), Jürg Schweri (Swiss Federal University for Vocational Education and Training), Felix Wenzelmann (BIBB), Stefan C. Wolter (IZA, University of Bern and CESifo Munich) ; IZA Institute of Labor Economics
