Publication Bias and Model Uncertainty in Measuring the Effect of Class Size on Achievement
Matěj Opatrný; Tomáš Havránek; Zuzana Iršová; Milan Ščasný · 2025 · Journal of Labor Economics
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Class size reduction mandates are frequent and invariably justified by studies reporting positive effects on student achievement. Yet other studies report no effects, and the literature as a whole awaits correction for potential…
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Metadata source: OpenAlex · DOI 10.1086/737989