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避孕药的力量:来自口服避孕药销售的证据

The Power of the Pill: Evidence from Oral Contraceptive Sales
The Economic Journal · 2025 · [{"name": "Kelly Ragan", "affiliation": ["Stockholm School of Economics"]}]

中文摘要

口服避孕药(“避孕药”)的问世是生育控制的一个分水岭。然而,由于数据有限,避孕药对生育的影响一直难以确定。我利用不同市场和时期丰富的避孕药销售数据,刻画了避孕药问世后瑞典青少年获取药房服务的便利程度如何影响避孕药销售与生育率。避孕药销售对药房可及性高度敏感,青少年生育率也对避孕药销售表现出强烈响应。这些独特的数据确立了从避孕药可及性到女性生育率这一因果链条中的重要一环。避孕药所引起的估计生育率响应可以解释其问世后青少年出生数量减半的现象;在考虑女性教育趋势、堕胎服务供给及其他因素后,这一发现依然稳健。

Abstract

Abstract The introduction of oral contraception (‘the pill’) was a watershed in fertility control. Yet, the pill’s impact on childbearing has been hard to establish due to limited data. I exploit rich data on pill sales across markets and time to characterise how Swedish teens’ access to pharmacies shaped pill sales and fertility after the pill’s introduction. Pill sales are highly sensitive to pharmacy access, and teen fertility responds strongly to pill sales. The unique data establish an important link in the causal chain from pill access to women’s fertility. Estimated fertility responses to the pill could explain the halving of teen births after the pill’s introduction, a finding that is robust to accounting for trends in female education, abortion provision and other factors.
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