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Performances of Core Indicators of Japan fs Consumer Price Index

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  • Shigenori Shiratsuka

    (Bank of Japan)

Abstract

The Bank of Japan (BOJ), in conducting monetary policy, employs the core indicators of the consumer price index (CPI) to identify the underlying trend of inflation by excluding various idiosyncratic disturbances from the overall CPI. Considering that sources of such idiosyncratic disturbances are not always constant over time, this article examines the performance of the core indicators by focusing on the stability over the estimation period. Empirical evidence reveals that the CPI excluding fresh food and trimmed mean generally show better performance than other indicators. It also shows that the performance of the CPI excluding fresh food is deteriorating currently, even though such deterioration, affected by large swings in crude oil prices, is likely to be temporary. In examining the underlying trend of inflation and explaining it to the public, it is thus important to consider various indicators, such as trimmed mean, and the CPI excluding fresh food and energy, even though the CPI excluding fresh food remains a main indicator, considering its high public awareness.

Suggested Citation

  • Shigenori Shiratsuka, 2015. "Performances of Core Indicators of Japan fs Consumer Price Index," Bank of Japan Review Series 15-E-7, Bank of Japan.
    • Handle: RePEc:boj:bojrev:rev15e07
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    Cited by:

    1. Nils Simon & Toshi H. Arimura & Minoru Morita & Akihisa Kuriyama & Kazuhisa Koakutsu, 2017. "Technology transfer and cost structure of clean development mechanism projects: an empirical study of Indian cases," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 19(3), pages 609-633, July.

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