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Consistent Aggregation With Superlative and Other Price Indices

Author

Listed:
  • Ludwig von Auer
  • Jochen Wengenroth

Abstract

Various fields of economic analysis (e.g., growth and productivity) and economic policy (e.g., monetary and social policy) rely on accurate measures of price change. Unfortunately, the price index formulae that most price statisticians consider as particularly accurate – the superlative indices of Fisher, Törnqvist, and Walsh – are believed to violate the property of consistency in aggregation. This property, however, is indispensable for economic studies that attempt to disaggregate the overall result into the contributions of individual entities such as sectors of the economy or groups of products. The present paper introduces a thoroughly motivated formal definition of consistency in aggregation and proves that, contrary to general perception, the three superlative price indices can be considered as consistent in aggregation. Furthermore, many other price indices are shown to be consistent in aggregation. The theoretical findings are applied to the Swedish consumer price index.

Suggested Citation

  • Ludwig von Auer & Jochen Wengenroth, 2019. "Consistent Aggregation With Superlative and Other Price Indices," Research Papers in Economics 2019-13, University of Trier, Department of Economics.
    • Handle: RePEc:trr:wpaper:201913
    as

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    References listed on IDEAS

    as
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    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    Consistent aggregation; index theory; superlative price index; decomposition; CPI;
    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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