ABSTRACT
The emphasis on Mexican undocumented immigration has also resulted from data and methodological issues. IRCA aimed to reduce both the stock and the flow of undocumented immigrants. It was designed to deal with sojourner and settler undocumented immigrants. The research reported by Warren represents the first successful attempt to quantify the number of visa overstayers, an important but unstudied component of illegal migration to the United States. The Immigration and Naturalization Service (INS) has instituted a policy of not deporting illegal aliens who are immediate relatives of aliens legalized under IRCA. The chapter explains IRCA, which has an impact, but to a large extent because it legalized a large proportion of the formerly undocumented population. The legalization of special agricultural workers (SAWs) was designed for the segment of the sojourner population working in agriculture. The IRCA legalization programs did succeed in reducing the size of the illegal immigrant population by legalizing large numbers of formerly illegal migrants.
