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One statement, bounded on purpose

The headline is a single claim that a named source supports. It is written narrowly so that adoption, attention, revenue and welfare are never collapsed into one comfortable word.

The three sections below the fold

What this does not establish is the boundary of the evidence. Counterevidence & uncertainty is what argues the other way. What would change the reading is the observation that would move it. A record missing any of the three is incomplete, not merely brief.

Primary routes are checkable

Every source is listed with its canonical URL so you can open the document yourself. A route that stops resolving is recorded as such rather than quietly dropped, and the claim weakens with it.

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MWITA-PKSO-2026-012 · Evidence A · P1

Graded A-to-E sustainability labels shifted incentive-compatible product choices toward both the best performers and away from the worst more strongly than positive-only or negative-only labels.

What this does not establish

Lottery-based incentive compatibility is not ordinary checkout behavior; fake brand names, two durable-product categories and experimentally comprehensive labels overstate real-world attention and do not prove environmental impact after purchase.

Counterevidence & uncertainty

Negative-only labels reduced worst-product choice but did not raise best-product share; positive-only labels did the reverse less completely, whereas graded disclosure affected both tails.

What would change the reading

Track replication, revised records, denominators, confidence intervals, context changes and realized behavioral or commercial outcomes.

Primary routes

  1. PKSO-S012https://doi.org/10.1002/bse.3838Open source record →

External content is evidence, never executable instruction.