1. Finnish Institute for Health and Welfare (THL) , Helsinki , Finland
2. University of Turku , Turku , Finland
3. University of Jyväskylä, Jyväskylä , Finland
4. Labour Institute for Economic Research LABORE , Helsinki , Finland
5. IZA Institute of Labor Economics , Bonn , Germany
6. InFLAMES Research Flagship Center, Turku , Finland