1. John Addison is at the Darla Moore School of Business, and Durham University Business School
2. Paulino Teixeira is in the Faculty of Economics at the University of Coimbra
3. Katalin Evers is at the German Federal Agency for Migration and Refugees
4. Lutz Bellmann is in the Department of Economics at the University of Erlangen-Nuremberg and the Institute for Employment Research of the German Federal Labour Agency