PPI Weights to be Updated for 2012 Census Shipment Values

In February 2018, with the release of January 2018 Producer Price Index (PPI) data, the Bureau of Labor Statistics will update PPI value weights to more accurately reflect recent production and marketing patterns. The updated weights will be based on shipment values from the year 2012. These value weights come from the Census of Manufactures, the Census of Mining, the Census of Services, and the Census of Agriculture. PPI weights have been based on 2007 Census shipment values since January 2012.

All PPIs will be affected by this weight update, including all the industry net output indexes, as well as indexes for traditional commodity groupings. In addition, weights will be updated from the 2007 to the 2012 Census for all Final demand-Intermediate demand (FD-ID) indexes, durability of product indexes, special commodity-grouping indexes, and input to industry indexes. This weight revision will not change any arithmetic reference bases for indexes, the dates when PPIs were set to 100.

It is important to note that the basic structures of the PPI commodity and FD-ID classification systems will not change as a result of the weight revision. The PPIs classified according to the North American Industry Classification System (NAICS), however, will be updated to reflect 2017 NAICS definitions, as established by the U.S. Census Bureau. The weight update will also result in significant shifts in the relative importance of various industries and products. These shifts will impact aggregate indexes in a manner commensurate with the relative gains and losses in value weights from 2007 to 2012.

In addition, the PPI sample updates normally occurring with the release of October and February data will be combined and released in conjunction with the weight update in February 2018. Commodity and FD-ID relative importance figures for December 2017 will be available two business days prior to the release of January 2018 PPI data. For further information on this update, contact the PPI Section of Index Analysis and Public Information, at ppi-info@bls.gov or (202) 691-7705.


Last Modified Date: August 10, 2017