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A winning formula? Elementary indices in the Retail Prices Index

Author

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  • Peter Levell

    (Institute for Fiscal Studies and Institute for Fiscal Studies)

Abstract

This paper considers the case for replacing the Carli index in the Retail Prices Index for calculating price changes at the elementary aggregate level. Following Diewert (2012), we go through each of the three approaches used to select appropriate index numbers: the test, stochastic and economic approaches. In each case, we find a few areas where our conclusions differ from Diewert's. Unlike Diewert, we are not as concerned that the Carli fails the time reversibility test, but note that it fails a revised price bouncing test. We find that the stochastic approach is inapplicable at the level of elementary aggregates, where by definition quantity weights for goods are unknown. However, we argue using insights from information theory, that the economic approach can be applied at this level and moreover that it favours the use of the Jevons index.

Suggested Citation

  • Peter Levell, 2012. "A winning formula? Elementary indices in the Retail Prices Index," IFS Working Papers W12/22, Institute for Fiscal Studies.
    • Handle: RePEc:ifs:ifsewp:12/22
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    File URL: http://www.ifs.org.uk/wps/wp1222.pdf
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    References listed on IDEAS

    as
    1. Varian, Hal R, 1982. "The Nonparametric Approach to Demand Analysis," Econometrica, Econometric Society, vol. 50(4), pages 945-973, July.
    2. W. E. Diewert, 1973. "Afriat and Revealed Preference Theory," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 40(3), pages 419-425.
    3. Crossley, Thomas F. & Pendakur, Krishna, 2010. "The Common-Scaling Social Cost-of-Living Index," Journal of Business & Economic Statistics, American Statistical Association, vol. 28(4), pages 523-538.
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