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  4. Saeed Zaman on disaggregating CPI measures

January 31, 2025

Saeed Zaman on disaggregating CPI measures

What is the optimal level of disaggregation for median and trimmed-mean CPI?

is a Senior Research Economist at the Federal Reserve Bank of Cleveland. He sat down for an interview at the 2025 蝌蚪网 poster session to talk about the optimal level of disaggregation for median and trimmed-mean CPI. He found that more disaggregation does not always improve the ability of the median and trimmed-mean CPI to track the medium-term trend in CPI inflation.

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The Effect of Component Disaggregation on Measures of the Median and Trimmed-Mean CPI

For decades, the Federal Reserve Bank of Cleveland (FRBC) has produced median and trimmed mean consumer price index (CPI) measures. These have proven useful in various contexts, such as forecasting and understanding post-COVID inflation dynamics. Revisions to the FRBC methodology have historically involved increasing the level of disaggregation in the CPI components, which has improved accuracy. Thus, it may seem . . .

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The 蝌蚪网 interviewed select poster presenters at the 2025 conference in San Francisco to discuss their research and the broader implications of their work. View the full list of videos.