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Measurement Errors in the Consumer Price Index: Perspectives on Numerical Targets for Price Stability in Major Economies

Author

Listed:
  • Satoshi Kobayashi

    (Director and Senior Economist, Institute for Monetary and Economic Studies (IMES), Bank of Japan (BOJ) (E-mail: satoshi.kobayashi@boj.or.jp))

  • Takeshi Shinohara

    (Deputy Director and Economist, International Department, BOJ (takeshi.shinohara@boj.or.jp))

  • Shigenori Shiratsuka

    (Professor, Faculty of Economics, Keio University (E-mail: shigenori.shiratsuka@keio.jp))

  • Nao Sudo

    (Deputy Director-General, Financial System and Bank Examination Department, BOJ (E-mail: nao.sudou@boj.or.jp))

  • Itofumi Takeuchi

    (Economist, IMES, BOJ (E-mail: itofumi.takeuchi@boj.or.jp))

Abstract

The consumer price index (CPI) is widely used by major central banks in the definition of a numerical target for price stability. In this context, the measurement errors, which became a significant concern following the U.S. Boskin Report in 1996, are still occasionally cited as one of the justifications for setting a positive inflation rate target. This paper presents a review of the current status of discussions and studies on measurement errors in major economies, including Japan, with a particular focus on those published since the Boskin Report. In light of the accumulated research to date, the implementation of solutions to enhance index accuracy in each country, and changes in economic structure, the magnitude of measurement errors that were pointed out in the report appears to have decreased overall, although there are differences across countries and types of errors. Nevertheless, certain areas, particularly those pertaining to service prices, continue to present challenges, and in consideration of the potential impact of changing economic structures, such as e-commerce, measurement errors may fluctuate significantly and remain unresolved in the transition towards a future increase in service consumption, a more digitalized economy, and an aging population. Given these issues, measurement errors could remain a valid basis for setting numerical targets for the CPI.

Suggested Citation

  • Satoshi Kobayashi & Takeshi Shinohara & Shigenori Shiratsuka & Nao Sudo & Itofumi Takeuchi, 2024. "Measurement Errors in the Consumer Price Index: Perspectives on Numerical Targets for Price Stability in Major Economies," IMES Discussion Paper Series 24-E-16, Institute for Monetary and Economic Studies, Bank of Japan.
  • Handle: RePEc:ime:imedps:24-e-16
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    References listed on IDEAS

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    More about this item

    Keywords

    Consumer Price Index; CPI; Measurement errors; Upper Bias; Quality Adjustment; Service Price;
    All these keywords.

    JEL classification:

    • C43 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - Index Numbers and Aggregation
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation

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