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Bias and Size Effects of Price-Comparison Search Engines: Theory and Experimental Evidence

Author

Listed:
  • Aurora García-Gallego

    (Universitat Jaume I)

  • Nikolaos Georgantzís

    (Universitat Jaume I)

  • Pedro Pereira

    (Autoridade da Concorrência)

  • José C. Pernías-Cerrillo

    (Universitat Jaume I)

Abstract

This article, analyzes the impact on consumer prices of the size and bias of price comparison search engines. we develop a model, related to Burdett and Judd (1983) and Varian (1980), and test experimentally several theoretical predictions. The experimental results confirm the model’s predictions regarding the impact of the number of firms, and the type of bias of the search engine, but reject the model’s predictions regarding changes in the size of the index.

Suggested Citation

  • Aurora García-Gallego & Nikolaos Georgantzís & Pedro Pereira & José C. Pernías-Cerrillo, 2007. "Bias and Size Effects of Price-Comparison Search Engines: Theory and Experimental Evidence," Working Papers 20, Portuguese Competition Authority.
    • Handle: RePEc:pca:wpaper:20
    as

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    File URL: http://www.concorrencia.pt/download/WP20_SearchEngines_Jan07.pdf
    File Function: First version, 2007
    Download Restriction: no
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    More about this item

    Keywords

    Search engines; incomplete information; biased information; price levels; experiments.;
    All these keywords.

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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