@EdWorkingPaper{ai19-143, title = "The Impact of Low-Ability Peers on Cognitive and Non-Cognitive Outcomes: Random Assignment Evidence on the Effects and Operating Channels", author = "Di Xu, Qing Zhang, Xuehan Zhou", institution = "Annenberg Institute at Brown University", number = "143", year = "2019", month = "October", URL = "http://www.edworkingpapers.com/ai19-143", abstract = {This paper 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 non-repeaters’ cognitive and non-cognitive 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.}, }