{
  "citation": "Angrist, J. D. and Lavy, V. (1999). Using Maimonides' Rule to Estimate the Effect of Class Size on Scholastic Achievement. Quarterly Journal of Economics 114(2): 533-575.",
  "deviation_evidence": "Set from the paper's stated convention before any tool or reference run: the printed standard error is a Moulton-type correction for within-school correlation (the authors' AngristLavy_Table4.do calls mmoulton_post.do), not the cluster-robust CR1 error the tool and the reference compute, so the printed SE is not expected to be reproduced. The coefficient is the same 2SLS point estimate under either convention.",
  "deviation_fields": [
    "se"
  ],
  "doi": "10.1162/003355399556061",
  "excerpt": "Class size −.158 (.040) N 2019",
  "independent": null,
  "item_set": null,
  "kind": "paper",
  "known_deviation": "se_convention",
  "licence": "Copyright of the publisher; cited, not reproduced.",
  "locator": "Table IV (2SLS estimates for 1991, fifth graders), column (1), reading comprehension, full sample, row 'Class size'",
  "metric": null,
  "n_items": null,
  "page": "554",
  "read_copy_sha256": "bf4b8d52ee493e27d46a81b8549fb71a5066cc4b6437b46b25c96c25a1a435b2",
  "retrieved_at": "2026-10-15",
  "se": 0.04,
  "se_as_published": ".040",
  "source_id": "angrist_lavy_1999.tab4_c1.paper",
  "tolerance_reason": null,
  "units": "points of the class average reading score per pupil",
  "url": "https://doi.org/10.1162/003355399556061",
  "value": -0.158,
  "value_as_published": "−.158",
  "verified_by": "primary_source",
  "verified_note": "Read on 2026-10-15 from the JSTOR copy of the QJE article on a WWU course page (44-page PDF); Table IV is a rotated scan on PDF page 22 (printed page 554), read from the rendered page image. Notes: 'Standard errors were corrected for within-school correlation between classes. All estimates use f_sc as an instrument for class size.' The authors' posted AngristLavy_Table4.do keeps 1 < classize < 45, c_size > 5, c_leom == 1, c_pik < 3 and a non-missing reading score, and runs mmoulton (clu(schlcode) 2sls). Column (1): N 2019."
}