Affiliation: | 1.Research Institute of Industrial Economics (IFN), Box 55665, 102 15, Stockholm, Sweden ;2.Department of Economics (KEKE), University of Economics in Prague, Prague, Czech Republic ;3.Department of Economics, Aarhus University, Fuglesangs Allé 4, 8210, Aarhus V, Denmark ;4.Research Institute of Industrial Economics (IFN), Stockholm, Sweden ; |