Published work is not treated as final and untouchable. This page describes what happens when it needs to change.
How a Correction Happens
Every piece of content on this site can carry an editorial note recorded against it, used for corrections, updates or disclosures, along with a content version number and a “last reviewed” date. When we correct something, that correction is recorded there, on the piece itself, rather than the original simply being edited away with no trace.
What Counts as a Correction
A factual error: a wrong figure, a misattributed claim, an outdated statement presented as current, gets a correction. Minor copy edits (fixing a typo, tightening a sentence) do not, since they don’t change what the piece claims.
Version History
Research reports in particular carry a visible changelog on the published page itself, so a reader can see what changed and when, not just what the current version says.
Reporting an Error
If you spot something you believe is wrong, use our contact form and tell us which page and what you think is incorrect. We read every report.