consistent over time, and all-items index tabulations are consistent with the different aggregations. A chained index between old and new series is not available. Revision policy and practice There is no regular program for updating the PPI; data are final when released. The results of weights change for the PPI are published. Data accessibility The PPI data are disseminated through press releases and also posted on the CBP website. Detailed tables contain indices, by seven groups of local products and four groups of imported products. An analysis of the major price