Preface. Introduction; G. Luciani. 1. Migration: New Demands and Approaches for Europe; D. Franklin. 2. Trends in International Migration in the 1990s and Beyond; R.T. Appleyard. 3. Are the Industrial Countries under Siege? A.R. Zolberg. 4. The United States Immigration Reform and Control Act of 1986: Implementation and Effects; G. Vernez. 5. Los Angeles, a World of New Immigrants: an Image of Things to Come? G. Sabagh. 6. The Dynamics of International Migration in Post-War Europe; G. Tapinos. 7. The Economic Impact of Immigration on the Host Country; A. Ichino.