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The Structure of Peers: The Impact of Peer Networks on Academic Achievement

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  • Matias Berthelon

    (Universidad Adolfo Ibáñez)

  • Eric Bettinger

    (Stanford University)

  • Diana I. Kruger

    (Universidad Adolfo Ibáñez)

  • Alejandro Montecinos-Pearce

    (Universidad Adolfo Ibáñez)

Abstract

Peer effects are an important contributing factor in the learning process. Most of the prior literature on peer effects focuses on the characteristics of peers rather than examining the structure of peer networks. We attempt to measure not only the impact of peers but also the structure of the peer network. In particular we are interested in the characteristics of students’ study groups along several dimensions: quality, heterogeneity, size and cohesion. Using pre-college characteristics of students and a random assignment into sections in their first year, we construct instruments of the study group measures to control for endogeneity of the network formation. Our OLS and IV estimates suggest that peer quality improves student performance, and that the breadth and cohesion of students’ network positively affects student outcomes. We also find significant heterogeneity of the results depending on network characteristics. Our findings can be used to assist university administrators or professors to choose criteria for sorting students into study groups.

Suggested Citation

  • Matias Berthelon & Eric Bettinger & Diana I. Kruger & Alejandro Montecinos-Pearce, 2019. "The Structure of Peers: The Impact of Peer Networks on Academic Achievement," Research in Higher Education, Springer;Association for Institutional Research, vol. 60(7), pages 931-959, November.
    • Handle: RePEc:spr:reihed:v:60:y:2019:i:7:d:10.1007_s11162-018-09543-7
    DOI: 10.1007/s11162-018-09543-7
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    Cited by:

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    4. Daniel Goller & Andrea Diem & Stefan C. Wolter, 2022. "Sitting next to a dropout: Study success of students with peers that came to the lecture hall by a different route," Economics of Education Working Paper Series 0190, University of Zurich, Department of Business Administration (IBW).

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