This article investigates if the location choices made by immigrants when they arrive in the United States are influenced by the interstate dispersion in welfare benefits. Income-maximizing behavior implies that foreign-born welfare recipients, unlike their native-born counterparts, may be clustered in the states that offer the highest benefits. The empirical analysis indicates that immigrant welfare recipients are indeed more heavily clustered in high-benefit states than the immigrants who do not receive welfare, or than natives. As a result, the welfare participation rate of immigrants is much more sensitive to changes in welfare benefits than that of natives.

"This article uses the 1970, 1980, and 1990 Public Use Samples of the U.S. census to document what happened to immigrant earnings in the 1980s and to determine if pre-1980 immigrant flows reached earnings parity with natives. The relative entry wage of successive immigrant cohorts declined by 9% in the 1970s and by an additional 6% in the 1980s. Although the relative wage of immigrants grows by 10% during the first 2 decades after arrival, recent immigrants will earn 15%-20% less than natives throughout much of their working lives."

This article analyzes the intergenerational mobility of immigrants. Using the 1940-70 censuses, the study reveals an important link between the earnings of immigrants and the earnings of their American-born children. Although there is some regression toward the mean, the earnings of second-generation Americans are strongly affected by variables describing economic conditions in the source countries of their parents. Current immigration policy, therefore, not only determines how immigrants perform in the labor market but also determines tomorrow's differences in the labor market experiences of American-born ethnic groups.

This paper reexamines the empirical basis for two "facts" that seem to be found in most cross-section studies of immigrant earnings: (1) the earnings of immigrants grow rapidly as they assimilate into the United States; and (2) this rapid growth leads to many immigrants' overtaking the earnings of the natives within 10-15 years after immigration. Using the 1970 and 1980 U.S. censuses, this paper studies the earnings growth experienced by specific immigrant cohorts during the period 1970-80. It is found that within-cohort growth is significantly smaller than the growth predicted by cross-section regressions for most immigrant groups. This differential is consistent with the hypothesis that there has been a secular decline in the "quality" of immigrants admitted to the United States.

Although economic theory predicts an inverse relation between relativewages and immigration-induced supply shifts, it has been difficultto document such effects. The weak evidence may be partly due to samplingerror in a commonly used measure of the supply shift, the immigrantshare of the workforce. After controlling for permanent factors thatdetermine wages in specific labor markets, little variation remainsin the immigrant share. We find significant sampling error in thismeasure of supply shifts in Canadian and U.S. census data. Correctingfor the resulting attenuation bias can substantially increase existingestimates of the wage impact of immigration. (c) 2011 by The University of Chicago. Allrights reserved.

This article studies the role of the family in determining the skill composition and labor market experiences of immigrants in the United States. Our theoretical framework, based on the assumption that family migration decisions maximize household income, shows that the family attenuates the selection characterizing the skills of the immigrant population. The empirical analysis uses the 1970 and 1980 Public Use Samples of the U.S. census and reveals that an immigrant's skills and labor market performance are greatly influenced by the composition of the household at the time of migration and by his placement in the immigration chain.

Natives are expected to respond to the wage impact of immigration by moving across markets. We argue that the observed impact depends not only on the size of the native response but also on which natives choose to respond. Specifically, a nonrandom response produces a selection bias. We document its empirical relevance by showing that the strong feminization of the French immigrant workforce reduced the employment of native women, leading to sizable compositional shifts and no correlation between immigration and female wages. Adjusting for selection bias results in a wage elasticity that becomes negative for women and similar to men.

Knowledge producers conducting research on a particular set of questions may respond to supply and demand shocks by shifting resources to a different set of questions. Cognitive mobility measures the transition from one location to another in idea space. We examine the cognitive mobility flows unleashed by the influx of Soviet mathematicians into the United States after the collapse of the Soviet Union. The data reveal that American mathematicians moved away from fields that received large numbers of Soviet émigrés. Diminishing returns in specific research areas, rather than beneficial human capital spillovers, dominated the cognitive mobility decisions of knowledge producers.