An in-depth guide on how we create estimates and the concepts we measure.
Learn more about the Chained CPI (C-CPI-U). The C-CPI-U reflects the effect of substitution that consumers make across item categories in responses to price changes.
Some products change over time. Find out how we make adjustments to ensure accurate price measurement.
Find out how we make adjustments to the data to account for seasonal patterns.
Read some working papers on ways we improve our measurement and analysis of trends in the data.
Detail on how we conduct the survey and short explanations of our concepts.
Explore additional information about the Consumer Price Index program including appendices to the Handbook of Methods and other papers.