Annual NIPA updates

Periodic updates of the NIPA estimates usually carried out each summer. These updates incorporate newly available source data that are based on more extensive annual surveys, on annual data fromother sources, and on revisions to the monthly and quarterly source datathat were not available for incorporation into the NIPA current quarterly estimates. The revisions cover at a minimum the 3 most recent calendar years, but BEA may extend the revision period to allow for the incorporation of improvements in methodologies whenwarranted. Also referred to as “annual revisions.”