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Global Trade and Conflicting National Interest

"Our objective," Baumol told a policy conference last summer, "is to show how outsourcing can indeed reduce the share of benefits of trade, not only for those who lose their jobs and suffer a direct reduction in wages but can wind up making the average American worse off than he or she would have been."

All of the countries that do this are better off than they would be without international trade. But even though it is possible to prove mathematically that this is true for nations, it is not true for every group of people within nations.

Yet even if one agrees that a country has a right to restrict immigration, it does not follow that it ought to do so. Mr Legrain argues that it is not just in the global interest to have free migration, but also in that of recipient countries. A standard “gains from trade” analysis would suggest that this should be true. But if one is to argue for free movement of labour on economic grounds one needs a sense of the likely consequences. Analyses of free migration in the presence of huge real wage differentials suggest that we would end up with vast informal sectors and shanty towns. That is what happens within poor countries. Why should it not happen across the globe? I cannot see how one would persuade a host population that this outcome would be in their interests.