Fighting against hunger: A country-wide intervention and its impact on birth outcomes
研究评估了墨西哥2013年启动的大规模食品援助政策“无饥饿”对新生儿出生体重的影响，发现该政策最多带来中等程度的改善。
In 2013 the Mexican government launched Sin Hambre (SH), a large-scale food assistance policy, with which to fight hunger, and which the government expressly intended to improve nutrition and access to food. This study applies a difference-in-differences approach using timing and regional variations in exposure to evaluate the impact of SH, particularly on average birthweight. Because municipalities were not selected randomly, the approach employs a method proposed by Imai et al. (2021) that improves the confidence to satisfy the parallel trend assumption under staggered adoption. Findings reveal that exposure to SH leads to, at most, moderate impacts on birthweight across various specifications.