| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w20599 |
| 来源ID | Working Paper 20599 |
| Second Trimester Sunlight and Asthma: Evidence from Two Independent Studies | |
| Nils Wernerfelt; David Slusky; Richard Zeckhauser | |
| 发表日期 | 2014-10-20 |
| 出版年 | 2014 |
| 语种 | 英语 |
| 摘要 | One in twelve Americans suffers from asthma and its annual costs are estimated to exceed $50 billion. Simultaneously, the root causes of the disease remain unknown. A recent hypothesis speculates that maternal vitamin D levels during pregnancy affect the probability the fetus later develops asthma. In two large-scale studies, we test this hypothesis using a natural experiment afforded by historical variation in sunlight, a major source of vitamin D. Specifically, holding the birth location and month fixed, we see how exogenous within-location variation in sunlight across birth years affects the probability of asthma onset. We show that this measurement of sunlight correlates with actual exposure, and consistent with pre-existing results from the fetal development literature, we find substantial and highly significant evidence in both datasets that increased sunlight during the second trimester lowers the subsequent probability of asthma. Our results suggest policies designed to augment vitamin D levels in pregnant women, the large majority of whom are vitamin D insufficient, could be very cost-effective. |
| 主题 | Health, Education, and Welfare ; Health ; Labor Economics ; Demography and Aging |
| URL | https://www.nber.org/papers/w20599 |
| 来源智库 | National Bureau of Economic Research (United States) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/578273 |
| 推荐引用方式 GB/T 7714 | Nils Wernerfelt,David Slusky,Richard Zeckhauser. Second Trimester Sunlight and Asthma: Evidence from Two Independent Studies. 2014. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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