Hatton, T. J., & Williamson, J. G. (2005). A dual policy paradox: Why have trade and immigration policies always differed in labor-scarce economies? National Bureau of Economic Research.
Chicago-Zitierstil (17. Ausg.)Hatton, Timothy J., und Jeffrey G. Williamson. A Dual Policy Paradox: Why Have Trade and Immigration Policies Always Differed in Labor-scarce Economies? Cambridge, Mass: National Bureau of Economic Research, 2005.
MLA-Zitierstil (9. Ausg.)Hatton, Timothy J., und Jeffrey G. Williamson. A Dual Policy Paradox: Why Have Trade and Immigration Policies Always Differed in Labor-scarce Economies? National Bureau of Economic Research, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.