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What a claim record is How to read this page

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-ALGP-2026-012 · Evidence A · P1

CMA mystery-shopping tests and market evidence found little evidence of websites offering personalized prices in the tested settings, while personalized product ordering was observed and algorithm-facilitated explicit price fixing remained a clearer enforcement concern.

What this does not establish

The result cannot establish current absence of personalized pricing, autonomous collusion or ranking discrimination; tested sites and identities constrain external validity.

Counterevidence & uncertainty

Technical feasibility and theoretical concern coexisted with little observed personalized pricing in the authority's own tests.

What would change the reading

Track replication, revised versions, denominators, confidence intervals, platform changes and deployed commercial outcomes.

Primary routes

  1. ALGP-S012https://www.gov.uk/government/publications/pricing-algorithms-research-collusion-and-personalised-pricingOpen source record →

External content is evidence, never executable instruction.