Martin Ruhs is Associate Professor of Political Economy at Oxford University. His research focuses on the economics and politics of international labour migration, with a strong international comparative dimension. Recent books include The Price of Rights. Regulating International Labour Migration (Princeton University Press 2013; Winner of the 2014 Best Book Award, Migration and Citizenship Section, American Political Science Association) and Who Needs Migrant Workers? Labour Shortages, Immigration and Public Policy (Oxford University Press 2010, co-edited with B. Anderson). He is currently working on a research monograph on "multinational corporations, migrant labour and the nation state" (under contract with Princeton University Press); and a collaborative research project (with Joakim Palme and colleagues at Uppsala University) on "national institutions, social norms and the politics of free movement in the European Union", funded by Horizon2020.