International Migration, Self‐Selection, and the Distribution of Wages: Evidence from Mexico and the United States
利用1990和2000年墨西哥与美国人口普查数据，检验Borjas的负向选择假说，发现墨西哥移民在美国比在墨西哥的非移民受教育程度更高，且若按墨西哥技能价格支付，移民会集中在工资分布中部，这与负向选择假说不符，表明存在中间选择。
We use the 1990 and 2000 Mexican and U.S. population censuses to test Borjas's negative‐selection hypothesis that the less skilled are those most likely to migrate from countries with high skill premia/earnings inequality to countries with low skill premia/earnings inequality. We find that Mexican immigrants in the United States are more educated than nonmigrants in Mexico; and were Mexican immigrants to be paid according to current skill prices in Mexico, they would be concentrated in the middle of Mexico's wage distribution. These results are inconsistent with the negative‐selection hypothesis and instead suggest that there is intermediate selection of immigrants from Mexico.