The regulation of labour immigration is among the most important and controversial public policy issues in high-income countries. How many migrant workers should be admitted, how should they be selected, and what rights should migrants be given after admission? Who are the winners and losers from opening our borders to more migrant workers from lower-income countries? Drawing on economics and politics, this lectures identifies major trade-offs in international labour migration and discusses the implications for national and global public policy debates. Dr Martin Ruhs is a University Lecturer in Political Economy and the author of The Price of Rights: Regulating International Labor Migration (Princeton University Press 2013).