Publication
Can Early Public Childcare Reduce Child Penalties? Evidence from Germany (with Lisa-Marie Duletzki)
Journal of Public Economics (2026)
한국의 직종 내 성별 임금격차 분석: 직종 내 고소득 여성비중을 중심으로 (with 최민식)
노동경제논집 (2019)
Revisiting the Gender Wage Gap In Korea: Focusing on Working Hours by Occupation (with Minsik Choi)
노동경제논집 (2017)
Working Papers
The Impact of Import Competition on Domestic Outsourcing in U.S. Manufacturing
Under Review
Presented in EWHA Economics Seminar (2026), SOLE Poster Session (2023), AMIE Lightning Talks (2022), and Annual Economics Graduate Students Conference of Washington University in St. Louis (2022)
Fathers' Response to Public Childcare Expansion: Whether and When to Take Parental Leave (with Lisa-Marie Duletzki)
Presented in KERIC (2025), Dresden Workshop (2025), IAB Workshop (2025)
Work In Progress
Promoting Innovation: Evidence from R&D Special zones in South Korea (with Hyung-jin Kim)
Promoting Innovation: Evidence from R&D Special Zones in South Korea
Do Domestic Outsourcing Practices Affect Men and Women Differently?
In this project, I examine how domestic outsourcing practices affect gender disparities in labor markets. Specifically, I aim to address three key questions: 1) Do workers in female-dominated occupations suffer larger wage losses after being outsourced? 2) Within the same occupations, do women face greater wage reductions after being outsourced? 3) If so, what mechanisms explain this, and how has it contributed to the overall gender inequality in the labor market? Regarding the first question, I find that workers in female-dominated occupations, such as cleaning or secretarial work, experience more significant earnings reductions after being outsourced than workers in male-dominated occupations, such as security or logistics, using German administrative data. Continuing work on the project will further investigate the remaining questions.
Hidden Impact of Public Childcare Expansion on Gender Inequality - Does It Also Affect Co-workers of Mothers? (with Lisa-Marie Duletzki)
In our paper “The Impact of Early Public Childcare on Child Penalties,” we have shown that the expansion of public childcare for very young children improves various labor market outcomes of mothers. This leads to a pertinent question: If more mothers return to work after childbirth and work longer hours in higher-paying positions due to increased public childcare availability, how does this affect the labor market outcomes of young female workers (pre-mothers) or their male coworkers? Better performance by mothers in labor markets post-childbirth could empower other women or influence employers’ hiring or promotion preferences for women. We aim to investigate this by leveraging variations in the employment share of mothers who gave birth in the year of childcare expansion at the county-establishment-occupation level. Using German administrative data, we identify coworkers of mothers within each establishment-occupation cell and examine how the proportion of mothers exposed to a sudden and large childcare expansion affects the wage growth of pre-mothers or male coworkers. Our preliminary findings indicate that pre-mothers in occupation-county cells with a higher concentration of mothers giving birth in the year of large childcare expansion experienced greater wage growth before becoming mothers.