Are Routine Jobs Moving South? Evidence from Changes in the Occupational Structure of Employment in the United States and Mexico
研究了美国中等工资就业下降是否源于与墨西哥的贸易，通过对比两国175个职业类别的就业变化，发现美国下降的职业在墨西哥同样下降，不支持贸易是主因的假设。
Employment in middle-wage jobs has declined in the United States over recent decades. At the same time, US trade with developing countries such as Mexico has intensified. We analyze whether the loss of middle-wage employment in the United States can be attributed to increasing trade with Mexico. We do this by contrasting the observed changes in employment across 175 detailed occupational categories in the two countries and find that, with few exceptions, occupations that declined in the United States have also declined in Mexico. The evidence is inconsistent with the hypothesis that trade between the United States and Mexico is a primary driver of the decline of middle-wage employment in the United States.