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Consumer Price Search and Platform Design in Internet Commerce

Author

Listed:
  • Michael Dinerstein

    (Stanford University)

  • Liran Einav

    (Stanford University)

  • Jonathan Levin

    (Stanford University)

  • Neel Sundaresan

    (eBay Inc)

Abstract

Search frictions can explain why the "law of one price" fails in retail markets and why even firms selling commodity products have pricing power. In online commerce, physical search costs are low, yet price dispersion is common. We use browsing data from eBay to estimate a model of consumer search and price competition when retailers offer homogeneous goods. We find that retail margins are on the order of 10%, and use the model to analyze the design of search rankings. Our model explains most of the effects of a major re-design of eBay's product search, and allows us to identify conditions where narrowing consumer choice sets can be pro-competitive. Finally, we examine a subsequent A/B experiment run by eBay that illustrates the greater difficulties in designing search algorithms for differentiated products, where price is only one of the relevant product attributes.

Suggested Citation

  • Michael Dinerstein & Liran Einav & Jonathan Levin & Neel Sundaresan, 2014. "Consumer Price Search and Platform Design in Internet Commerce," Discussion Papers 13-038, Stanford Institute for Economic Policy Research.
    • Handle: RePEc:sip:dpaper:13-038
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    References listed on IDEAS

    as
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    More about this item

    JEL classification:

    • D12 - Microeconomics - - Household Behavior - - - Consumer Economics: Empirical Analysis
    • D22 - Microeconomics - - Production and Organizations - - - Firm Behavior: Empirical Analysis
    • D47 - Microeconomics - - Market Structure, Pricing, and Design - - - Market Design
    • 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
    • L86 - Industrial Organization - - Industry Studies: Services - - - Information and Internet Services; Computer Software

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