Now in a revised and expanded third edition, this widely adopted text provides a global perspective on the nature of migration movements, why they take place, and their effects on industrialized countries and the developing world. Extensively rewritten chapters provide information on and comparative analyses of the world's main migration regions. The role of migration in the formation of ethnic minority groups is examined, as is the impact of growing ethnic diversity on economies, cultures, and political institutions. Included are a wealth of concrete examples, tables, and maps.