MARKMA publishes external claims only with a link to a primary source and a review date. A claim without a verifiable source is not published.
What counts as a source
A source is a document that readers can open and check themselves:
- official documents and recommendations from platforms and regulators;
- peer-reviewed publications and systematic reviews;
- textbooks and specialist reference books;
- service documentation when a claim concerns how that service works.
Machine-readable metadata
Each external source records its title, organization, URL, publication date if available, access date, source type and the claim it supports. The record is schema-validated, so a link cannot be added without stating its relationship to a claim and its review date.
What is published without an external source
MARKMA metric definitions, formulas and examples follow its own transparent arithmetic. Their source is the methodology and calculation code, so an external citation is unnecessary and is not added for appearance. If a page makes no external claims, its source list remains empty.
What the site does not publish
The site does not publish unsupported “market averages,” summaries of other roundups without links to primary sources, or claims attributed to nonexistent specialists. An unverifiable figure is not presented as an industry benchmark.
Errors
If you find an unsourced claim or a link without a review date, please report it. We prioritize these reports alongside calculation errors.