1. Department of Sociology/ICS, Utrecht University, P.O. Box 80140, 3508 TC Utrecht, Netherlands
2. Research and Documentation Centre (WODC), PO box 20301, 2500 EH The Hague, Netherlands
3. Department of Sociology, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
4. Netherlands Institute for Social Research|SCP, PO box 16164, 2500 BD The Hague, Netherlands
5. Norwegian Tax Administration, PO Box 9200, 0134 Oslo, Norway