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Identification of Child Penalties

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  • Dor Leventer

Abstract

A growing body of research estimates child penalties, the gender gap in the effect of parenthood on labor market earnings, using event studies that normalize treatment effects by counterfactual earnings. I formalize the identification framework underlying this approach, which I term Normalized Triple Differences (NTD), and show it does not identify the conventional target estimand when the parallel trends assumption in levels is violated. Insights from human capital theory suggest such violations are likely: higher-ability individuals delay childbirth and have steeper earnings growth, a mechanism that causes conventional estimates to understate child penalties for early-treated parents. Using Israeli administrative data, a bias-bounding exercise suggests substantial understatement for early groups. As a solution, I propose targeting the effect of parenthood on the gender earnings ratio and show this new estimand is identified under NTD.

Suggested Citation

  • Dor Leventer, 2026. "Identification of Child Penalties," Papers 2602.07486, arXiv.org.
    • Handle: RePEc:arx:papers:2602.07486
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