Tim Hatton is Professor of Economics at the University of Essex and at the Australian National University. His research interests include the causes and effects of international migration, refugees and asylum policy in Europe. His other interests are in economic history, most recently in health and height in the 19thand 20thcenturies. His books include Seeking Asylum: Trends and Policies in the OECD (CEPR, 2011) and (with Jeffrey G. Williamson) Global Migration and the World Economy: Two Centuries of Policy and Performance (MIT Press, 2005). He is a Fellow of the IZA, CReAM and the CEPR.