Abstract
We study the effect of immigration on global welfare. The world is modeled as consisting of two regions, South and North, the former populated by low-skill workers, and the latter by both low- and high-skill workers. Production in the North uses both labor inputs in a complementary way. A trade union in the North keeps the wage of low-skill workers above the Walrasian wage, generating unemployment of low-skill workers. Northern citizens fund unemployment benefits for workers through taxation. Immigration from South to North has two effects in the North: a mixed native-foreign working-class lowers union power, because of reduced solidarity among low-skill workers, and hence it lowers the mark-up on the Walrasian wage that the union is able to negotiate. It also lowers the solidarity between employed citizens and the unemployed (as the latter, now, consist in part of non-natives) and thus the unemployment benefit, set by a democratic process, falls. We calculate the optimal levels of immigration, from the viewpoint of an observer who maximizes global welfare, according to an egalitarian and a utilitarian social welfare function. We compare these levels to the open-borders-equilibrium level. We find that the optimal level of immigration for the cosmopolitan egalitarian is significantly less than the open-borders equilibrium level, while the optimal level for a global utilitiarian is significantly greater than the open-borders level.
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Roemer, J.E. The Global Welfare Economics of Immigration. Soc Choice Welfare 27, 311–325 (2006). https://doi.org/10.1007/s00355-006-0127-x
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DOI: https://doi.org/10.1007/s00355-006-0127-x