Alternative value-added specifications produce substantially different teacher estimates but small changes in distribution tails¶
Claim · All claims
Evidence · 1 study · associationalr?·q2
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2016: 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
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This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? The different specifications produce substantially different value-added estimates for teachers, yet only small changes in the tails of the value-added distribution. → Ali Protik 2013
Evidence¶
Ali Protik 2013¶
Ali Protik, Elias Walsh, Alexandra Resch, Eric Isenberg, Emma Kopa. (2013). Does Tracking of Students Bias Value-Added Estimates for Teachers? Working Paper 15. Washington, DC: Mathematica Policy Research. https://www.mathematica.org/publications/does-tracking-of-students-bias-value-added-estimates-for-teachers
q2 · i? · associational · r?
Comparison of value-added estimates across model specifications using urban school district data. The paper reports the specifications "produce substantially different value-added estimates" but "small changes in the tails of value-added distribution."
"While these different specifications produce substantially different value-added estimates, they produce small changes in the tails of value-added distribution"
Discussion¶
Related Claims¶
- The working paper examines the sensitivity and precision of teacher value-added estimates under specifications differing in student-level, peer-level, and double-lagged achievement controls — related
- Teacher value-added estimates are highly correlated across model specifications that differ in student and peer control variables — reports the opposite
- The choice of which assessment to use as the outcome measure matters more for value-added estimates than any student or peer control-variable specification choice — related
- Including track indicators in value-added models may reduce tracking-related bias for high school reading teachers — related
- Detecting that students are tracked to teachers does not necessarily imply bias in teacher effectiveness estimates — related
- Value-added teacher rankings are insensitive to correcting measurement error in the pretest, with correlations of 0.91–0.99 for elementary and 0.77–0.98 for middle school teachers — related
- Up to 26% of teachers in the bottom value-added quintile under one specification are ranked higher under another specification — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
specification-differences-small-tail-changes |
title |
Alternative value-added specifications produce substantially different teacher estimates but small changes in distribution tails |
description |
Alternative value-added specifications produce substantially different teacher estimates but small changes in distribution tails |
status |
review |
evidence_strength |
weak |
newest_evidence |
2013 |
recheck_by |
2016 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — ali-protik-2013 |
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