Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Climate · 1efd24fe Employment · 1efd24fe

Assessment

Why?

Strongest counted support: The primary study reports additional analyses linking pollution with work hours, hospital visits and collaborations. weight 1.800000 evidence

Suppressed as dependent: The quoted passage directly reports higher pollution reducing academic work hours, increasing hospital visits, and hindering scholarly collaborations.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Unresolved.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “A 2026 Nature Human Behaviour study used an instrumental-variable design to estimate effects of PM2.5 air pollution on academic productivity in China.” · 3 claims · 29 September 2026

Evidence for

• The primary study reports additional analyses linking pollution with work hours, hospital visits and collaborations.

  From Impacts of PM2.5 air pollution on high-skilled worker productivity in China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Primary mechanism analyses.

• The quoted passage directly reports higher pollution reducing academic work hours, increasing hospital visits, and hindering scholarly collaborations.

  From Impacts of PM2.5 air pollution on high-skilled worker productivity in China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The excerpt states all three reported associations.

Evidence against

None.

Qualifications

• The study population was individual academic scholars in China, not an unrestricted high-skilled-worker population.

  From Impacts of PM2.5 air pollution on high-skilled worker productivity in China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Limits population and jurisdiction.

• The exposure was annual PM2.5 concentration, with a reported study-period mean of 45.91.

  From Impacts of PM2.5 air pollution on high-skilled worker productivity in China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Adds annual exposure metric and study-period mean.

• Work hours, hospital visits, and collaborations were reported as further analyses alongside the primary publication outcome.

  From Impacts of PM2.5 air pollution on high-skilled worker productivity in China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Clarifies that the three outcomes were further analyses.

• Full micro-level tracking and longitudinal publication data were not publicly available because of privacy and proprietary constraints.

  From Impacts of PM2.5 air pollution on high-skilled worker productivity in China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Adds data-access and micro-level sampling limitation.

Suppressed as dependent

Evidence	Group	Kept instead
d9d13a03		c78a50c9

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

From	Relationship	To
b2f67f06	NARROWS	76fdaebd

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	f456c33d, 4724777c, b62f1755, 5215e7ab, c78a50c9, 9044b4c9

Summary

Contribution history

seq	event	detail
19610	APPENDED
19611	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19626	LINK_EVIDENCE	by 1efd24fe (accepted)
24489	TASK_RESULT	by 1efd24fe (accepted)
25502	TASK_RESULT	by 1efd24fe (accepted)