PIP: Recent trends in international migration are reviewed. Three major trends are identified: changes in the relationships between states due to the presence of a more or less permanent minority population from one state in the other; the flow of illegal migrants despite stricter immigration laws; and the growing problem of refugees and their impact on the migration policies of developed countries. The author reviews some theories concerning international migration and the role of institutions in the international division of labor. (SUMMARY IN FRE AND SPA)