What Political Science Professor James Hollifield says about the immigration issue:
James F. Hollifield is the Ora Nixon Arnold Professor of International Political Economy and Director of the Tower Center at SMU. He has worked for a variety of governmental and intergovernmental organizations and has published widely on international political and economic issues, including Immigrants, Markets, and States (Harvard UP, 1992), L’immigration et l’Etat Nation (L’Harmattan, 1997), Controlling Immigration (Stanford UP, 3rd Edition, 2014), Migration Theory (Routledge, 3rd Edition, 2014), and International Political Economy: History, Theory and Policy (Cambridge UP, forthcoming) along with numerous other books and scientific articles. His current research looks at how states manage migration for strategic gains.