Effects of ability mixing in high school on adulthood earnings: Quasiexperimental evidence from South Korea

Changhui Kang, Cheolsung Park, Myoung-jae Lee

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13 Citations (Scopus)


We estimate impacts of ability mixing compared to ability grouping in high school education on students' adulthood earnings. To overcome endogeneity and selection problems that plagued the previous studies, we exploit a policy experiment in South Korea in the 1970s, which changed the education regime of general high schools from grouping to mixing in major cities. We find that the mixing treatment has a positive but statistically insignificant effect on average adulthood earnings. We also find that while mixing has positive effects on low ability students' adulthood earnings, it has smaller positive or even negative effects on higher ability students.

Original languageEnglish
Pages (from-to)269-297
Number of pages29
JournalJournal of Population Economics
Issue number2
Publication statusPublished - 2007 Apr 1



  • Ability grouping
  • Mixing
  • Tracking

ASJC Scopus subject areas

  • Demography
  • Economics and Econometrics

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