We provide evidence that constraints that prevent highly skilled women from working long hours hinder gender pay equality. We show that relaxing one such constraint by increasing the supply of substitutes for household production—proxied by intercity variation in predicted low-skilled immigration—increases the relative earnings of women in occupations that disproportionately reward overwork. Low-skilled immigration inflows induce young women to enter occupations with higher returns to overwork and shift women toward higher quantiles of the male wage distribution. The share of women in the top decile remains unaffected, suggesting that other barriers prevent women from reaching the very top.

We explore how the availability of affordable live-in help provided by foreign domestic workers (FDWs) in Hong Kong affected native women’s labor supply and welfare. First, we exploit differences in the FDW program between Hong Kong and Taiwan. Second, we use cross-sectional variation in the cost of a FDW to estimate a model of labor force participation and FDW hire. FDWs increased the participation of mothers with a young child (relative to older children) by 10–14 percentage points and have generated a monthly consumer surplus of US130–US200. By reducing child care costs through immigration, this is a market-based alternative to child care subsidies.