1. Department of Spatial Economics; VU University Amsterdam; De Boelelaan 1105 1081 HV Amsterdam the Netherlands
2. Migration Policy Centre; European University Institute; Florence Italy
3. IZA; Bonn Germany
4. Institute of Socio-Economic Geography and Spatial Management; Adam Mickiewicz University; Poznan Poland
5. National Institute of Demographic and Economic Analysis; University of Waikato; Hamilton New Zealand