Findings on the distribution of highest-performing teachers are robust to omitting empirical Bayes shrinkage of the value-added estimates¶
Claim · All claims
Evidence · 1 study · associationalr3·q2
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2014: tool and model accuracy changes quickly
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? Reproducing the analysis without empirical Bayes shrinkage of value-added estimates did not change the findings. → Steven Glazerman and Jeffrey Max 2011
Evidence¶
Steven Glazerman and Jeffrey Max 2011¶
Steven Glazerman and Jeffrey Max. (2011). Do Low-Income Students Have Equal Access to the Highest-Performing Teachers? NCEE Technical Appendix. http://ies.ed.gov/ncee/pubs/20114016/pdf/20114016.pdf
q2 · i? · associational · r3
Alternative-specification check of the main distributional findings, re-estimating teacher performance measures without the empirical Bayes shrinkage step. The article states the "results were robust to this alternative specification".
"We also reproduced the findings when the value added estimates were not adjusted using Empirical Bayes shrinkage and the results were robust to this alternative specification."
Discussion¶
Related Claims¶
- Empirical Bayes shrinkage increases the precision of value-added estimates and reduces their absolute value for teachers of hard-to-predict students — related
- Shrinkage has no statistically significant effect on the relative probability that teachers of hard-to-predict students receive extreme value-added ratings — related
- Shrinkage does not change accountability consequences for teachers of hard-to-predict students, since extreme-rating probabilities are unaffected — related
- Main results are robust to grouping schools into four poverty quartiles instead of five quintiles — related
- Across ten districts combined, high-poverty middle schools have significantly fewer highest-performing teachers than low-poverty middle schools — related
- The report synthesizes 21 empirical studies on value-added model key issues and findings — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
findings-robust-to-omitting-eb-shrinkage |
title |
Findings on the distribution of highest-performing teachers are robust to omitting empirical Bayes shrinkage of the value-added estimates |
description |
Findings on the distribution of highest-performing teachers are robust to omitting empirical Bayes shrinkage of the value-added estimates |
status |
review |
evidence_strength |
weak |
newest_evidence |
2011 |
recheck_by |
2014 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — steven-glazerman-and-jeffrey-max-2011 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.