On Estimating the Effects of Immigrant Legalization: Do U.S. Agricultural Workers Really Benefit?
研究移民合法化对经济回报的影响，发现低技能而非歧视解释了合法与非法移民的工资差异，对政策制定者和农业从业者有参考价值。
The question of whether legalization affects immigrants' economic returns has been the focus of many empirical studies in recent decades. Results have consistently shown that there are significant wage differences between legal and illegal workers. However, the validity of such findings has been questioned, given the lack of good identification strategies to account for omitted variables. In this article we propose using techniques designed to address the issue of selection into treatment based (to some degree) on unobservables. Our results suggest that lower skill levels—not discrimination—explain differences in immigrants' economic outcomes.