I study the short-run and long-run effects of exposure to peers from disrupted families in adolescence. Using the National Longitudinal Study of Adolescent to Adult Health (Add Health) data, I find that girls are mostly unaffected by peers from disrupted families, while boys exposed to more peers from disrupted families exhibit more school problems in adolescence and higher arrest probabilities, less stable jobs, and higher probabilities of suffering from financial stress as young adults. These results suggest negative effects on non-cognitive skills but no effect on cognitive skills, as measured by academic performance. The dramatic increase in family disruption in the USA should thus receive more attention, as the intergenerational mobility and inequality consequences could be larger than anticipated as a result of classroom spillovers.

我研究了青春期与来自破碎家庭的同龄人接触的短期和长期影响。使用国家青少年到成人健康纵向研究（Add Health）数据，我发现女孩大多不会受到来自家庭破裂的同龄人的影响，而与更多来自家庭破裂的同龄人接触的男孩在青春期表现出更多的学校问题和更高的被捕概率，更少稳定的工作，以及年轻人遭受经济压力的可能性更高。这些结果表明对非认知技能有负面影响，但对以学业成绩衡量的认知技能没有影响。因此，美国家庭破裂的急剧增加应该受到更多关注，因为课堂溢出效应所造成的代际流动性和不平等后果可能比预期更大。