How to partly bounce back the struggle against illegal immigration to the source countries

Recent models on the dynamics of immigration control claim that tightening internal borders may trigger the formation of networks supporting clandestine foreign workers. This may, in turn, increase the overall stock of illegal immigrants in the economy. One possible solution to this threatening situation might be to partly bounce back the struggle against illegal immigration to the source countries. This paper suggests that under certain conditions, the receiving country should direct some of the resources earmarked for coping with the problem of the illegal flow of workers to financially supporting the source countries, allowing them to compete among themselves for such aid. This support would be allocated according to the relative effort made by each source country in curbing illegal immigration, thereby motivating them to moderate the phenomenon. The model is also applicable to other fields of negative externalities, such as the smuggling of drugs and weapons, terrorism, and pollution.