Glenn Rayp is full Professor of International Economics at Ghent University, Belgium, and senior research fellow of UNU-CRIS. He is a former member of the Belgian High Council of Finance and High Council on Employment. His current research is centred on the impact of international trade on labour market conditions and productivity, the impact of regional integration and issues in international governance, in particular the selectiveness of migration policy, the substance of regional governance and its impact on the achievement of the UN Sustainable Development Goals.  Ilse Ruyssen is Assistant Professor in International Economics at the Department of Economics, Ghent University, and Research Fellow at UNU-CRIS and IRES (Institute of Economic and Social Research), Université catholique de Louvain, Belgium. She is involved in several research projects concerning the economics of international migration, with a particular focus on the determinants of worldwide migration patterns including climatic factors, conflict and other types of violence, integration policies, as well as the measurement and comparison of immigration policy restrictiveness and selectivity.  Katrin Marchand is a post-doctoral researcher at UNU-MERIT (a joint research institute of the United Nations University and Maastricht Economic and Social Research Institute on Innovation and Technology) and its Maastricht Graduate School of Governance. Since 2010, she has been working as a researcher on a variety of projects in the field of migration using both quantitative and qualitative methods. Her main research interests are in migration and development, specifically labour migration, migrants’ occupational choices and the interlinkages of migration and private sector development.