The Impact of Classroom Peers in a Streaming System

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This paper investigates educational production with a focus on the influence that socio-economic status of class peers has on academic outcomes of students in a streaming system. Employing the Swiss subsample of the PISA data, I provide evidence that while classroom assignment is not random within schools or tracks it is random within tracks-by-schools. Track-by-school fixed effects therefore render peer group composition conditionally uncorrelated with students' characteristics, while track fixed effects and school fixed effects don’t. Estimates based on track fixed-effects and school fixed-effects approaches are reduced sizably by employing a track-by-school fixed-effects approach while mean effects on test results in mathematics and problem solving remain significant.
TidsskriftEconomics of Education Review
Udgave nummerdec.
Sider (fra-til)110–128
Antal sider19
StatusUdgivet - 2015


  • Education
  • Peer effects
  • Ability streaming