I näst senaste JEEA (13:1) publicerades en ny ambitiös studie av de ekonomiska konsekvenserna av migration, för både mottagarland och ursprungsland, och både på kort och lång sikt.
A Global View of Cross-Border Migration av Julian di Giovanni,Andrei A. Levchenko, och Francesc Ortega.
Här tycks finnas en fritt tillgänglig version.

Ur abstract:
In the long run, natives in countries that received a lot of migration -- such as Canada or Australia -- are better off due to greater product variety available in consumption and as intermediate inputs. In the short run the impact of migration on average welfare in these countries is close to zero, while the skilled and unskilled natives tend to experience welfare changes of opposite signs. The remaining natives in countries with large emigration flows -- such as Jamaica or El Salvador -- are also better off due to migration, but for a different reason: remittances. The welfare impact of observed levels of migration is substantial, at about 5% to 10% for the main receiving countries and about 10% in countries with large incoming remittances.