Our annual Forecast evaluation report (FER), published each autumn, examines how our forecasts compare to subsequent outturn data and identifies lessons for future forecasts.
Within each of our key publications we include topical ‘boxes’. These self-contained analyses are unique to this publication and tend to cover recent developments in the economy or public finances that complement the main discussion of our analyses.
Revisions to National Accounts data are a normal part of the Blue Book process, which reconciles the different measures of GDP and incorporates information from annual data sources. This box set out the key differences between the vintage of data used for the purposes of the October 2011 Forecast Evaluation Report and the data consistent with the 2011 Blue Book.