Recent and upcoming methodology changes
With January 2018 data, smartphones, which are part of the telephone hardware, calculators, and other consumer information items index, will be quality adjusted to account for the rapid rate of technological advancements and improved quality to customers. Additional information on the process is available at Measuring Price Change in the CPI: Telephone hardware, calculators, and other consumer information items.
Used cars and trucks
With January 2018 data, the Consumer Price Index for used cars and trucks will change from a three-month moving average to a single month price change. This modification will result in an index that reflects price change closer to the reference period.