Class Size

Diane Whitmore Schanzenbach*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations


This article summarizes the literature on the impact of class size on student achievement. Following a brief discussion of the theory linking class size to student outcomes, I review the experimental and quasi-experimental evidence on the impact of class size. Research using a variety of approaches across a variety of settings indicates that class size is an important factor in student outcomes.

Original languageEnglish (US)
Title of host publicationInternational Encyclopedia of the Social & Behavioral Sciences: Second Edition
PublisherElsevier Inc
Number of pages4
ISBN (Electronic)9780080970875
ISBN (Print)9780080970868
StatePublished - Mar 26 2015


  • Achievement
  • Causal inference
  • Class size
  • Class-size reduction
  • Education inputs
  • Education policy
  • Education production function
  • Experiments
  • Long-term impacts
  • Quasi-experiments

ASJC Scopus subject areas

  • General Social Sciences


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