Standard
Material factual, calculation, attribution or methodology-description errors are corrected promptly after verification. The updated publication records the date and nature of the change when it affects interpretation.
Index and methodology
Technical corrections follow governed data and methodology controls. Public explanations do not overwrite technical provenance or historical records.
Research
Substantive Research keeps an updated date and correction status. Minor spelling or formatting fixes may be made without a formal notice when meaning is unchanged.
Report an issue
Send a stable URL, the disputed statement and supporting evidence to [email protected].