This article presents arguments and data to show that the decennial census and annual Current Population Surveys include immigrants falling into four broad legal status groups: naturalized citizens; legal immigrants; legal nonimmigrants; and undocumented migrants. Since 1986, the relative rewards and penalties imposed on these four categories have shifted dramatically in response to U.S. policies, as have the relative number of foreigners in each group. In general, the relative share of foreigners in the most vulnerable status groups has increased, with the proportion of undocumented migrants and legal nonimmigrants rising and that of legal immigrants falling. Researchers using census and CPS data need to be aware of the shifting distribution of foreigners by legal status over time and of the changing profile of opportunities experienced by each status group, and they need to exercise caution in their interpretation of trends with respect to immigrant assimilation and the effects of immigration on U.S. society. © 2005 by the Center for Migration Studies of New York. All rights reserved.

[No Keywords available]

immigration policy World legal rights Western Hemisphere United States North America immigrant population