RT Journal Article SR Electronic T1 The Impact of Low-Ability Peers on Cognitive and Noncognitive Outcomes JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 555 OP 596 DO 10.3368/jhr.57.2.0718-9637R2 VO 57 IS 2 A1 Xu, Di A1 Zhang, Qing A1 Zhou, Xuehan YR 2022 UL http://jhr.uwpress.org/content/57/2/555.abstract AB This article presents new experimental estimates of the impact of low-ability peers on own outcomes using nationally representative data from China. We exploit the random assignment of students to junior high school classrooms and find that the proportion of low-ability peers, defined as having been retained during primary school (“repeaters”), has negative effects on nonrepeaters’ cognitive and noncognitive outcomes. An exploration of the mechanisms shows that a larger proportion of repeater peers is associated with reduced after-school study time. The negative effects are driven by male repeaters and are more pronounced among students with less strict parental monitoring at home.