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Measurement Error in the Consumer Price Index: Where Do We Stand?

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  • David E. Lebow
  • Jeremy B. Rudd

Abstract

We survey the evidence on CPI bias and provide our best estimate of its magnitude. We also identify a "weighting" bias that has not been quantified previously. We estimate that the CPI currently overstates the rate of change in the cost of living by about 0.9 percentage point per year, with a confidence interval ranging from 0.3 to 1.4 percentage points. Our estimate is boosted by new evidence that substitution bias has increased sharply since the mid-1990s, and is reduced by the cumulative impact of a variety of recent improvements to BLS procedures. The study discusses potential areas for further improvement.

Suggested Citation

  • David E. Lebow & Jeremy B. Rudd, 2003. "Measurement Error in the Consumer Price Index: Where Do We Stand?," Journal of Economic Literature, American Economic Association, vol. 41(1), pages 159-201, March.
    • Handle: RePEc:aea:jeclit:v:41:y:2003:i:1:p:159-201
    Note: DOI: 10.1257/002205103321544729
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