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Price and Index Number Research
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Beginning with the April 2025 update, of the New Tenant Rent Index (R-CPI-NTR) and All Tenant Regressed Rent Index (R-CPI-ATRR) contain the following three updates to the methodology. These updates are applied to the entire span of both series. Future releases of the R-CPI-NTR and R-CPI-ATRR should contain these updates as well. Note that the archived releases prior to April 2025 will not be updated to reflect these changes.
Change in Aggregation Weights
The aggregation of basic index area indices will now use a different set of weights based on expenditures. The R-CPI-NTR and R-CPI-ATRR are calculated for each basic index area and then combined to produce a U.S. city average. Prior to April 2025, the price relatives of basic areas were combined using aggregation weights, which are a quantity-based measure.
R-CPI-ATRR Variance Formula
The methodology for calculating the standard deviation for the over-the-year changes in the R-CPI-ATRR has been updated for consistency with the R-CPI-NTR.
Change in the Number of Bootstrap Samples
The number of resamples used in the bootstrap estimation of the R-CPI-NTR confidence intervals has been changed from 100 to 50.