Cross-Country Variation in the Impact of International Migration: Canada, Mexico, and the United States
利用加拿大、墨西哥和美国的人口普查数据，发现移民导致的劳动力供给变化与工资之间存在显著负相关，但移民对工资结构的影响在三国间差异显著：加拿大缩小了工资不平等，美国加剧了不平等，墨西哥则降低了低技能工人的相对工资。
Using data drawn from the Canadian, Mexican, and U.S. censuses, we find a numerically comparable and statistically significant inverse relation between immigrant-induced shifts in labor supply and wages in each of the three countries: A 10% labor supply shift is associated with a 3%–4% opposite-signed change in wages. Despite the similarity in the wage response, the impact of migration on the wage structure differs significantly across countries. International migration narrowed wage inequality in Canada; increased it in the United States; and reduced the relative wage of workers at the bottom of the skill distribution in Mexico.