[Mexican families in their homeland and in exile]

"The present study takes advantage of the Mexican and American census simultaneity in Spring 1990 to compare the Mexican populations according to their migratory status. The analysis of their composition by age and by sex is completed by an estimation of the undercount of migrants omitted by these statistics.... The fertility of the Mexican immigrants is compared to that of the country of origin and to that of Mexican Americans so as to specify changes induced by the exile. But one of the most interesting mutations deals with the recomposition of the migrant's family in the U.S.: units of residence gain in complexity by the extended integration of relatives or individuals that do not belong to the nuclear family." (SUMMARY IN ENG AND SPA)