Low-Skilled Immigration and the Labor Supply of Highly Skilled Women
研究了低技能移民增加是否导致高技能女性（时间机会成本最高）改变时间使用决策，发现低技能移民增加了高薪女性（工资分布前25%）的市场工作时间、减少家务时间并增加家政服务支出。
Low-skilled immigrants represent a significant fraction of employment in services that are close substitutes of household production. This paper studies whether the increased supply of low-skilled immigrants has led high-skilled women, who have the highest opportunity cost of time, to change their time-use decisions. Exploiting cross-city variation in immigrant concentration, we find that low-skilled immigration increases average hours of market work and the probability of working long hours of women at the top quartile of the wage distribution. Consistently, we find that women in this group decrease the time they spend in household work and increase expenditures on housekeeping services.