Beautiful inside and out: Peer characteristics and academic performance
利用美国青少年健康调查数据，研究发现女生自身的人格吸引力提升学业成绩，而男生的学业受自身外貌和人格吸引力正向影响，但高比例外貌吸引力的同伴会降低男生后期成绩，尤其对生理成熟度低的男生影响更大，机制是自信心下降。
This paper explores the effect of own and peer attractiveness on various measures of academic performance. Using data from the National Longitudinal Survey of Adolescent Health (Add Health), we focus on high school students in the United States and exploit random variation within schools across cohorts in adolescents' physical and personality attractiveness as assessed by the interviewer. We find that for girls only own personality attractiveness boosts academic outcomes. For boys instead, both own physical and personality attractiveness positively affect performance and peer characteristics also matter. An increase in the fraction of physically attractive high school peers decreases boys' academic performance in later years. We show that this effect is driven by less physically mature boys and operates through a decrease in self-confidence.