As a followup to an earlier study, this report examines the numbers, motivations, characteristics, and labor market behavior of legal immigrants to the United States. The data used is from published and unpublished government statistics, a survey of 5,000 1970 immigrants, and interviews with 254 of the 1970 cohort. The first three chapters provide the historical, demographic, and legislative background for the 400,000 immigrants that arrive on the average annually. Chapters 4 and 5 focus on the 1970 cohort of immigrants, discussing their earnings, personal characteristics, motivation for immigration, and labor market experiences. Whenever possible, comparisons are drawn between the 1970 immigrants and other groups of immigrants as well as between the general population and the immigrants. It is reported that (1) although most immigrants come to the U.S. for economic reasons, the majority are admitted for familial, not labor-related, reasons; (2) their demographic profile closely resembles the general population in age mix, educational level, and marital status; (3) their earnings increase in the U.S., and they work fewer hours; (4) female immigrants quickly earn as much as their peers while the males more slowly approach equity; and (5) substantial occupational change occurs for the immigrants, much of which is downward. The report concludes with recommendations for legislation to aid immigrants in the labor market and to change U.S. immigration policies. (ELG)