Do students benefit from longer school days? Regression discontinuity evidence from Florida's additional hour of literacy instruction

David N Figlio*, Kristian L. Holden, Umut Ozek

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations


Instructional time is a fundamental educational input, yet we have little causal evidence about the effect of longer school days on student achievement. This paper uses a sharp regression discontinuity design to estimate the effects of lengthening the school day for low-performing schools in Florida by exploiting an administrative cutoff for eligibility. Our results indicate significant positive effects of additional literacy instruction on student reading achievement. In particular, we find effects of 0.05 standard deviations of improvement in reading test scores for program assignment in the first year, though long-run effects are difficult to assess.

Original languageEnglish (US)
Pages (from-to)171-183
Number of pages13
JournalEconomics of Education Review
StatePublished - Dec 1 2018



  • Extended school days
  • Inequality
  • Instruction time

ASJC Scopus subject areas

  • Education
  • Economics and Econometrics

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