Externalities in the Classroom: How Children Exposed to Domestic Violence Affect Everyone's Kids
利用儿童学校记录与家庭暴力案件匹配的独特数据，研究发现来自问题家庭的儿童会显著降低同伴的阅读和数学成绩，并增加课堂不良行为，为家庭暴力的负外部性提供了因果证据。
There is a widespread perception that externalities from troubled children are significant, though measuring them is difficult due to data and methodological limitations. We estimate the negative spillovers caused by children from troubled families by exploiting a unique dataset in which children's school records are matched to domestic violence cases. We find that children from troubled families significantly decrease the reading and math test scores of their peers and increase misbehavior in the classroom. The achievement spillovers are robust to within-family differences and when controlling for school-by-year effects, providing strong evidence that neither selection nor common shocks are driving the results.