This paper summarises a research programme on the new immigrant second generation initiated in the early 1990s and completed in 2006. The four field waves of the Children of Immigrants Longitudinal Study (CILS) are described and the main theoretical models emerging from it are presented and graphically summarised. After considering critical views of this theory, we present the most recent results from this longitudinal research programme in the form of quantitative models predicting downward assimilation in early adulthood and qualitative interviews identifying ways for the disadvantaged children of immigrants to escape it. Quantitative results strongly support the predicted effects of exogenous variables identified by segmented assimilation theory and identify the intervening factors during adolescence that mediate their influence on adult outcomes. Qualitative evidence gathered during the last stage of the study points to three factors that can lead to exceptional educational achievement among disadvantaged youths, and which indicate the positive influence of selective acculturation. Finally, the implications of these findings for theory and policy are discussed.

We supplement earlier published findings on the academic achievement of the immigrant second generation with an analysis of school contextual effects based on the same large data set used by the best-known prior analyses, the Children of Immigrants Longitudinal Study. A hierarchical model of contextual and individual-level effects on academic achievement and school attrition reveals patterns that reproduce those found in national student surveys but also others that are unique to the second generation. Among the latter are the resilient negative effect of length of U.S. residence on achievement across school contexts and the fact that strong effects of national origin on grades are attenuated in schools with high proportions of coethnics. Mexican-origin students display significant disadvantages in achievement and retention that are generally compounded, not alleviated, by the schools that they attend. A theoretical explanation of this pattern is advanced, and its practical implications are discussed.

This study was prompted by concerns about the ways in which immigrant organizations, especially those of a transnational character, may retard or prevent political integration among recent migrants to the United States. For this purpose, we constructed an inventory of all organizations created by Colombian, Dominican and Mexican immigrants in the United States, interviewed leaders of the twenty largest organizations from each group in person, and conducted a survey of 178 additional organizations by telephone or Internet. Results reveal a near-absence of perceived conflict between transnational activism and political incorporation. Almost without exception, leaders asserted that there was no contradiction between home-country loyalties and activities and US citizenship and voting. These results appear to reflect genuine conviction, rather than any social desirability syndrome. Objective indicators show that most organizations maintain close ties with US political authorities at various levels and engage in a number of US-focused civic and political activities. Determinants of such engagement are examined. Implications of the results for theory and public policy are discussed.

On the basis of a study of forty health care delivery institutions in Florida, California, and New Jersey, this paper examines the interaction between the immigration and health systems in the USA. We investigate barriers to care encountered by the foreign born, especially unauthorized immigrants, and the systemic contradictions between demand for their labour and the absence of an effective immigration policy. Lack of access and high costs have forced the uninsured poor into a series of coping strategies, which we describe in relation to commercial medicine. We highlight regional differences and the importance of local politics and history in shaping health care alternatives for the foreign born.

In this essay, I review opposite positions on the relationship between migration and the socio-economic development of sending countries and regions, and the theoretical schools that underlie each of them. In order to adjudicate between these competing perspectives, it is necessary to distinguish between the human capital composition of different migrant flows, their duration, and their structural significance and change potential. This theoretical discussion culminates in a typology that seeks to clarify under which conditions migration can have developmental effects and under which it will be contrary to the advancement of home communities and countries. Policy implications of this analysis, in particular the role of governments in sending and receiving nations, are examined.