Water Quality Awareness and Breastfeeding: Evidence of Health Behavior Change in Bangladesh
研究利用孟加拉国全国性信息宣传运动的时间变化和砷暴露的地理差异，发现该运动促使母亲延长母乳喂养时间，尤其是当她们难以获得未受污染的水井时，并降低了婴儿死亡率和腹泻发病率。
Decades of campaigns have cautioned households in Bangladesh about waterborne contaminants such as arsenic. In addition to switching water sources, mothers can protect young children from contaminated water by breastfeeding longer. We exploit time series variation in whether children were born before or after a nationwide information campaign and geographic variation in exposure to arsenic. We find that mothers breast-feed children longer in response to the campaign, especially when they have less access to uncontaminated wells, and that infants are more likely to be exclusively breast-fed. We find consistent evidence of lower mortality rates and diarrheal incidence for infants.