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Scanner data, time aggregation and the construction of price indexes

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Author Info

  • Ivancic, Lorraine
  • Erwin Diewert, W.
  • Fox, Kevin J.

Abstract

We examine the impact of time aggregation on price change estimates for 19 supermarket item categories using scanner data. Time aggregation choices lead to a difference in price change estimates for chained indexes which ranged from 0.28% to 29.73% for a superlative index and an incredible 14.88%-46,463.71% for a non-superlative index. Traditional index number theory appears to break down with weekly data, even for superlative indexes. Monthly and (in some cases) quarterly time aggregation were insufficient to eliminate downward drift in superlative indexes. To eliminate drift, a novel adaptation of a multilateral index number method is proposed.

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Bibliographic Info

Article provided by Elsevier in its journal Journal of Econometrics.

Volume (Year): 161 (2011)
Issue (Month): 1 (March)
Pages: 24-35

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Handle: RePEc:eee:econom:v:161:y:2011:i:1:p:24-35

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Web page: http://www.elsevier.com/locate/jeconom

Related research

Keywords: Price indexes Scanner data Chain drift Multilateral index number methods Rolling window GEKS;

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References

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  1. Diewert, W Erwin, 1978. "Superlative Index Numbers and Consistency in Aggregation," Econometrica, Econometric Society, vol. 46(4), pages 883-900, July.
  2. Robert C. Feenstra & Matthew D. Shapiro, 2001. "High-Frequency Substitution and the Measurement of Price Indexes," NBER Working Papers 8176, National Bureau of Economic Research, Inc.
  3. W. Erwin Diewert, 1995. "Axiomatic and Economic Approaches to Elementary Price Indexes," NBER Working Papers 5104, National Bureau of Economic Research, Inc.
  4. W. Erwin Diewert, 1999. "Axiomatic and Economic Approaches to International Comparisons," NBER Chapters, in: International and Interarea Comparisons of Income, Output, and Prices, pages 13-107 National Bureau of Economic Research, Inc.
  5. Caves, Douglas W & Christensen, Laurits R & Diewert, W Erwin, 1982. "Multilateral Comparisons of Output, Input, and Productivity Using Superlative Index Numbers," Economic Journal, Royal Economic Society, vol. 92(365), pages 73-86, March.
  6. Diewert, W. E., 1976. "Exact and superlative index numbers," Journal of Econometrics, Elsevier, vol. 4(2), pages 115-145, May.
  7. Mary F. Kokoski & Brent R. Moulton & Kimberly D. Zieschang, 1999. "Interarea Price Comparisons for Heterogeneous Goods and Several Levels of Commodity Aggregation," NBER Chapters, in: International and Interarea Comparisons of Income, Output, and Prices, pages 123-169 National Bureau of Economic Research, Inc.
  8. William J. Hawkes & Frank W. Piotrowski, 2003. "Using Scanner Data to Improve the Quality of Measurement in the Consumer Price Index," NBER Chapters, in: Scanner Data and Price Indexes, pages 17-38 National Bureau of Economic Research, Inc.
  9. Hill, Robert J., 2006. "Superlative index numbers: not all of them are super," Journal of Econometrics, Elsevier, vol. 130(1), pages 25-43, January.
  10. Reinsdorf, Marshall B, 1999. "Using Scanner Data to Construct CPI Basic Component Indexes," Journal of Business & Economic Statistics, American Statistical Association, vol. 17(2), pages 152-60, April.
  11. Drechsler, Laszlo, 1973. "Weighting of Index Numbers in Multilateral International Comparisons," Review of Income and Wealth, International Association for Research in Income and Wealth, vol. 19(1), pages 17-34, March.
  12. Kravis, Irving B, 1984. "Comparative Studies of National Incomes and Prices," Journal of Economic Literature, American Economic Association, vol. 22(1), pages 1-39, March.
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Citations

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Cited by:
  1. Abe, Naohito & Moriguchi, Chiaki & Inakura, Noriko, 2014. "The Impact of the Great East Japan Earthquake on Commodity Prices: New Evidence from High-Frequency Scanner Data," Research Center for Price Dynamics Working Paper Series 12, Research Center for Price Dynamics, Institute of Economic Research, Hitotsubashi University.
  2. Martin Berka & Michael B. Devereux & Thomas Rudolph, 2011. "Price setting in a leading Swiss online supermarket," CAMA Working Papers 2011-19, Centre for Applied Macroeconomic Analysis, Crawford School of Public Policy, The Australian National University.
  3. , & Diewert, Erwin, 2014. "An Empirical Illustration of Index Construction using Israeli Data on Vegetables," Economics working papers erwin_diewert-2014-11, Vancouver School of Economics, revised 11 Mar 2014.
  4. Ivancic, Lorraine & Fox, Kevin J., 2013. "Can dissimilarity indexes resolve the issue of when to chain price indexes?," Economics Letters, Elsevier, vol. 118(1), pages 6-9.
  5. Diewert, Erwin & Shimizu, Chihiro, 2013. "Residential Property Price Indexes for Tokyo," HIT-REFINED Working Paper Series 3, Institute of Economic Research, Hitotsubashi University.
  6. Kota Watanabe & Tsutomu Watanabe, 2014. "We construct a Törnqvist daily price index using Japanese point of sale (POS) scannerdata spanning from 1988 to 2013. We find the following. First, the POS based inflation rate tends to be about 0.," CARF F-Series CARF-F-342, Center for Advanced Research in Finance, Faculty of Economics, The University of Tokyo.
  7. Marcelo Delajara & José Antonio Murillo Garza, 2012. "Weekday with Low Prices: Evidence on Daily Seasonality of Foods, Beverages, and Tobacco Prices," Working Papers 2012-09, Banco de México.
  8. Diewert, W. Erwin & Nishimura , Kiyohiko & Shimizu, Chihiro & Watanabe, Tsutomu, 2014. "Residential Property Price Indexes for Japan: An Outline of the Japanese Official RPPI," Economics working papers erwin_diewert-2014-17, Vancouver School of Economics, revised 27 Mar 2014.
  9. Abe, Naohito & Moriguchi, Chiaki & Inakura, Noriko, 2012. "The Great East Japan Earthquake and its Short-run Effects on Household Purchasing Behavior," Research Center for Price Dynamics Working Paper Series 2, Research Center for Price Dynamics, Institute of Economic Research, Hitotsubashi University.
  10. von der Lippe, Peter, 2012. "Notes on GEKS and RGEKS indices," MPRA Paper 42730, University Library of Munich, Germany.
  11. Kevin J. Fox & Iqbal A. Syed, 2014. "Price Discounts and the Measurement of Inflation," Discussion Papers 2014-05, School of Economics, The University of New South Wales.

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