Endowments at Birth and Parents’ Investments in Children
利用坦桑尼亚大规模碘补充计划，研究发现父母对禀赋较高的子女投资更多（如接种疫苗和延长母乳喂养），且对兄弟姐妹也有正向溢出效应，但生育行为和出生时投资未受影响。
Do parents invest more in higher quality children, or do they compensate for lower quality by giving more to children with lower endowments? We answer this question in the context of a large-scale iodine supplementation programme in Tanzania. We find that children with higher programme exposure were more likely to receive necessary vaccines and were breastfed for longer. Siblings of treated children were also more likely to be immunised. Fertility behavior and investments at the time of birth were unaffected.