1 DTU Management Engineering, Building 424, Technical University of Denmark, DK-2800, Lyngby, Denmark. Electronic address: kaed@dtu.dk.
2 DTU Management Engineering, Building 424, Technical University of Denmark, DK-2800, Lyngby, Denmark; Department of Sociology and Work Science, University of Gothenburg, Box 705, SE-405 30, Gothenburg, Sweden. Electronic address: jorgen.winkel@gu.se.