The Effect of Sorority Membership on Eating Disorders, Body Weight, and Disordered‐Eating Behaviors
研究利用美国大学健康调查数据，通过倾向得分匹配和工具变量方法，发现姐妹会成员与体重相关结果存在相关性，但除BMI外，没有证据表明姐妹会身份是这些结果的原因。
Eating disorders are currently the deadliest mental disorder in the United States, affecting an estimated 12%-25% of all college women. Previous research has found a positive correlation between sorority membership and eating disorders, but the causal link has not been firmly established. We contribute to the literature by investigating a possible causal link among sororities and diagnosed eating disorders, measurable weight outcomes, and disordered-eating behaviors using data from the American College Health Association Survey. We handle the potential endogeneity of sorority membership using propensity score matching and instrumental variable methods to determine whether joining a sorority is a cause of the weight-related outcomes we study. We find that sorority members exhibit worse weight-related outcomes than those not in a sorority. However, our propensity score matching and instrumental variable results suggest that, other than BMI, this is merely a correlation, and there is little evidence that sorority membership is a cause of the outcomes we study. Copyright © 2016 John Wiley & Sons, Ltd.