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Erscheinungsjahr: 
2023
Schriftenreihe/Nr.: 
ECONtribute Discussion Paper No. 266
Verlag: 
University of Bonn and University of Cologne, Reinhard Selten Institute (RSI), Bonn and Cologne
Zusammenfassung: 
Motherhood continues to pose significant challenges to women's careers, and a correct assessment of its effects is crucial for understanding the persistent gender inequality in the labor market. We show that the prevalent approach to estimate post-birth earnings losses - so called "child penalties" - is prone to yield substantially biased results. We demonstrate that the biases stem from conventional event studies pooling together first-time mothers of all ages, without considering their distinct characteristics and the varying impact of motherhood. To address the biases, we propose a novel approach that accounts for the heterogeneity by building upon recent advancements in the econometric literature on difference-in-differences models. Applying it to administrative data from Germany, we demonstrate that considering heterogeneity by maternal age at birth is crucial for both methodological correctness and a deeper understanding of gender inequality. Our approach yields substantially larger estimates of earnings losses after childbirth (by 20 percent), indicating that the costs of motherhood and related gender gaps in Germany are even larger than previously thought. Moreover, we demonstrate that effects and their interpretation differ significantly depending on maternal age at birth. We show that younger first-time mothers experience larger career costs of motherhood, as they miss out on the phase of the most rapid career progression.
Schlagwörter: 
child penalty
maternal labor supply
heterogeneous treatment effects
event studies
JEL: 
J13
J16
J31
C23
Dokumentart: 
Working Paper

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