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How consumer price index inflation is calculated: BLS sources on price collection, index areas, item strata, geometric means and where the evidence stops.
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Gasoline: Beginning with the release of June 2021 indexes, BLS uses a secondary source dataset for gasoline instead of traditional in-person or website collection.
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New vehicles: With the release of April 2022 indexes, BLS-collected data for the new vehicles index was replaced with transaction data from J.D.
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Reference base: The reference base for the C-CPI-U is December 1999 equals 100.
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Statistical uncertainty: The estimated standard error of the 1-month percent change for the U.S. all items CPI is 0.04 percent.
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CPI data are published for 23 metropolitan areas, 4 geographic regions and 9 divisions as defined by the Census Bureau.
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Educational content, not investment advice. Full article and sources below.
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