Breastfeeding and Child Development
利用周末医院母乳喂养支持服务较差导致出生时间临近周末的儿童母乳喂养率降低这一自然实验，估计了母乳喂养对低学历母亲子女七岁前发展的影响，发现母乳喂养显著促进认知发展，但对健康和非认知发展无显著影响。
We show that children who are born at or just before the weekend are less likely to be breastfed, owing to poorer breastfeeding support services in hospitals at weekends. We use this variation to estimate the effect of breastfeeding on children's development in the first seven years of life, for a sample of births of low-educated mothers. We find large effects of breastfeeding on children's cognitive development but no effects on health or noncognitive development during the period of childhood we consider. Regarding mechanisms, we study how breastfeeding affects parental investments and the quality of the mother-child relationship.