With contributions by Mark Bell (Trinity College Dublin, Ireland), Niklas Bruun (Hanken School of Economics, Finland), Thomas Erhag (University of Gothenburg, Sweden), Mijke Houwerzijl (Tilburg University, The Netherlands), Teun Jaspers (Utrecht University and the University of Amsterdam, The Netherlands), Sylvaine Laulom (Cour de Cassation (Chambre sociale), France), Antonio Lo Faro (University of Catania, Italy), Pascale Lorber (University of Leicester, United Kingdom), Ann Numhauser-Henning (Lund University, Sweden), Marta Otto (University of Warsaw, Poland), Frans Pennings (Utrecht University, The Netherlands), Saskia Peters (University of Groningen, The Netherlands), Łukasz Pisarczyk (University of Zielona Góra and the University of Silesia, Katowice, Poland), Jan Popma (Dutch Labour Inspectorate and Vrije Universiteit Amsterdam, The Netherlands), Sophie Robin-Olivier (Université Paris 1 Panthéon- Sorbonne, France) and Herwig Verschueren (University of Antwerp, Belgium). To