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Differences between Online Prices and the Consumer Prices Index During Covid-19 in Germany

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  • Robert Laskowski

    (University of Finance and Administration)

Abstract

The purpose of this paper is to examine various online price indices with the consumer price index in Germany during the Covid-19 pandemic from 2019 to 2021. This investigation refers to 9,977 items of the product category stationery and drawing supplies, whose sales prices were automatically recorded and evaluated by Amazon.de and idealo.de on a daily basis through web scraping. The official consumer price index of the German Federal Statistical Office of the 3rd Stella level is available for this product category, which makes a direct comparison possible for this study. It was found that online prices are more dynamic and volatile and react directly to external market influences than the prices of stationary trade, which are reflected in the CPI of the German Federal Statistical Office. A deviation of up to 11.7% between the calculated online price indices (OPI) and the German consumer price index (CPI) was found. Especially the value-added increase on 01.01.2021 shows a deviation effect of 9.7% to the CPI. It could be determined that the online price indices and the CPI showed the same trends, but with different characteristics. While Amazon's OPI was still in line with the CPI in 2020, deviations of over 6% were observed in 2021. The prices of other online shops already showed significant deviations from the CPI within the first lockdown in April 2021, which was imposed by the government to contain the Covid 19 pandemic in Germany and forced the stationary trade to close down across the country.

Suggested Citation

  • Robert Laskowski, 2022. "Differences between Online Prices and the Consumer Prices Index During Covid-19 in Germany," ACTA VSFS, University of Finance and Administration, vol. 16(1), pages 76-87.
  • Handle: RePEc:prf:journl:v:16:y:2022:i:1:p:76-87
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    References listed on IDEAS

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    1. Alberto Cavallo, 2017. "Are Online and Offline Prices Similar? Evidence from Large Multi-channel Retailers," American Economic Review, American Economic Association, vol. 107(1), pages 283-303, January.
    2. Alberto Cavallo, 2018. "Scraped Data and Sticky Prices," The Review of Economics and Statistics, MIT Press, vol. 100(1), pages 105-119, March.
    3. Austan Goolsbee & Judith Chevalier, 2002. "Measuring Prices and Price Competition Online: Amazon and Barnes and Noble," NBER Working Papers 9085, National Bureau of Economic Research, Inc.
    4. Karyne B. Charbonneau & Alexa Evans & Subrata Sarker & Lena Suchanek, 2017. "Digitalization and Inflation: A Review of the Literature," Staff Analytical Notes 17-20, Bank of Canada.
    5. Alberto Cavallo & Roberto Rigobon, 2016. "The Billion Prices Project: Using Online Prices for Measurement and Research," Journal of Economic Perspectives, American Economic Association, vol. 30(2), pages 151-178, Spring.
    6. Hansen, Malte, 2020. "Dynamische Preissetzung im Onlinehandel: zu den Auswirkungen auf den Verbraucherpreisindex," WISTA – Wirtschaft und Statistik, Statistisches Bundesamt (Destatis), Wiesbaden, vol. 72(5), pages 91-102.
    7. Hansen, Malte, 2020. "Dynamische Preissetzung im Onlinehandel: zur langfristigen Anwendung von automatisierter Preiserhebung," WISTA – Wirtschaft und Statistik, Statistisches Bundesamt (Destatis), Wiesbaden, vol. 72(3), pages 14-23.
    8. Alberto Cavallo, 2018. "More Amazon Effects: Online Competition and Pricing Behaviors," NBER Working Papers 25138, National Bureau of Economic Research, Inc.
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    More about this item

    Keywords

    inflation; online price index; consumer price index; ecommerce; online trade; statistical office; Amazon; Idealo;
    All these keywords.

    JEL classification:

    • G00 - Financial Economics - - General - - - General
    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • E20 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - General (includes Measurement and Data)

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