The Immigration and Nationality Act of 1965 imposed, for the first time in US history, annual numerical restrictions on lawful immigration from the Western Hemisphere. This paper introduces and implements a method for estimating highly granular local unauthorized rates in the wake of the surge in Latin American immigration that ensued. Using within-state, cross-county variation in these estimated unauthorized rates for foreign-born Mexican women and multiple comparison groups, we then estimate how maternal legal status affects the health of US-born—and thus US-citizen—children. We find that maternal authorization increases birth weight in the second generation.
Cascio et al. (Fri,) studied this question.