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Journal of Political Economy Vol. 133 No. 10 2025

Rationed Fertility: Treatment Effect Heterogeneity in the Child Quantity-Quality Trade-Off

Rufei Guo1; Junjian Yi2; Junsen Zhang3; Ning Zhang4

1 Center for Social and Economic Research · 2 George Institute for Global Health · 3 Zhejiang University · 4 Chinese University of Hong Kong

Abstract

We develop a generalized theory of rationed fertility to analyze treatment effect heterogeneity in the child quantity-quality trade-off. An exogenous increase in fertility can be either desired or undesired. We derive a positive rationing income effect on child quality for desired fertility increases but a negative rationing income effect for undesired fertility increases. We propose an econometric framework to identify treatment effects of desired and undesired fertility increases and estimate a structural model to gauge the quantitative importance of the novel rationing income effect. Our study highlights the importance of distinguishing between desired and undesired changes when evaluating social programs.

DOI
10.1086/736768
Volume
133
Issue
10
Pages
3349-3386
Language
en
Sources
bibtex:phds-export.bib openalex crossref

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