The Impact of Immigration Enforcement on the U.S. Farming Sector
利用2002-2010年美国多县数据，研究地方移民执法（287(g)项目）对农业的影响，发现执法减少了移民数量，并可能推高农场工人工资、改变劳动力使用和产出选择，导致农场利润下降。
Abstract We examine the effects of local immigration enforcement efforts on U.S. agriculture in dozens of U.S. counties from 2002–2010 by using variations in the timing of adoption of 287(g) programs, which permit local police to enforce immigration law. Difference‐in‐differences models using microdata from the American Community Survey (2005–2010 waves) and county tabulations from the Census of Agriculture (1997, 2002, and 2007) yield robust evidence that county enforcement efforts have reduced immigrant presence in adopting jurisdictions. We also find evidence that wages of farm workers, patterns of farm labor use, output choices, and farm profitability may have been affected in a manner consistent with farm labor shortages.