title: Why Are Some More Peer Than Others? Evidence from a Longitudinal Study of Social Networks and Individual Academic Performance.
abstract: Studies of peer effects in educational settings confront two main problems. The first is the presence of endogenous sorting which confounds the effects of social influence and social selection on individual attainment. The second is how to account for the local network dependencies through which peer effects influence individual behavior. We empirically address these problems using longitudinal data on academic performance, friendship, and advice seeking relations among students in a full-time graduate academic program. We specify stochastic agent-based models that permit estimation of the interdependent contribution of social selection and social influence to individual performance. We report evidence of peer effects. Students tend to assimilate the average performance of their friends and of their advisors. At the same time, students attaining similar levels of academic performance are more likely to develop friendship and advice ties. Together, these results imply that processes of social influence and social selection are sub-components of a more general a co-evolutionary process linking network structure and individual behavior. We discuss possible points of contact between our findings and current research in the economics and sociology of education.
authors: University of Lugano (Switzerland) & Universita di Bologna (Italy).
authors: Alessandro
authors: A
authors: Lomi
authors: University of Oxford (UK) & University of Groningen (The Netherlands).
authors: Tom A B
authors: TA
authors: Snijders
authors: University of Groningen (The Netherlands).
authors: Christian E G
authors: CE
authors: Steglich
authors: University of Greenwich, (London, UK) & Luiss Business School (Rome, Italy).
authors: Vanina Jasmine
authors: VJ
authors: Torlo
keywords: Education; Network dynamics; Peer effects; Social networks; Stochastic actor-oriented models
references: AJS. 2009 Nov;115(3):832-62
references: 20503743
references: AJS. 2008 May;113(6):1645-1696
references: 21031147
references: AJS. 1968 Sep;74(2):119-37
references: 5755152
references: Child Dev. 1997 Dec;68(6):1198-209
references: 9418234