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Price Dispersion in the Small and in the Large: Evidence from an Internet Price Comparison Site

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Author Info
Michael R. Baye (Department of Business Economics and Public Policy, Indiana University Kelley School of Business)
John Morgan (University of California at Berkeley)
Patrick Scholten (Bentley College)

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Abstract

This paper examines 4 million daily price observations for over 1000 consumer electronics products on the price comparison site Shopper.com. We find little support for the notion that prices on the Internet are converging to the “law of one price.” In addition, observed levels of price dispersion vary systematically with the number of firms listing prices. The difference between the two lowest prices (the “gap”) averages 22 percent when two firms list prices, and falls to 3.5 percent in markets where 17 firms list prices. These empirical results are an implication of a general “clearinghouse” model of equilibrium price dispersion.

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File URL: http://www.bus.indiana.edu/riharbau/RePEc/iuk/wpaper/bepp2004-03-baye-morgan-scholten.pdf
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Publisher Info
Paper provided by Indiana University, Kelley School of Business, Department of Business Economics and Public Policy in its series Working Papers with number 2004-03.

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Date of creation: 2004
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Publication status: Published in Journal of Industrial Economics, 2004
Handle: RePEc:iuk:wpaper:2004-03

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Related research
Keywords: Bertrand Competition Internet Law of One Price Price dispersion

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Find related papers by JEL classification:
L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
D4 - Microeconomics - - Market Structure and Pricing
D8 - Microeconomics - - Information, Knowledge, and Uncertainty
M3 - Business Administration and Business Economics; Marketing; Accounting - - Marketing and Advertising

References listed on IDEAS
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  1. Pratt, John W & Wise, David A & Zeckhauser, Richard, 1979. "Price Differences in Almost Competitive Markets," The Quarterly Journal of Economics, MIT Press, vol. 93(2), pages 189-211, May. [Downloadable!] (restricted)
  2. Burdett, Kenneth & Judd, Kenneth L, 1983. "Equilibrium Price Dispersion," Econometrica, Econometric Society, vol. 51(4), pages 955-69, July. [Downloadable!] (restricted)
  3. Shilony, Yuval, 1977. "Mixed pricing in oligopoly," Journal of Economic Theory, Elsevier, vol. 14(2), pages 373-388, April. [Downloadable!] (restricted)
  4. Michael R. Baye & John Morgan, 2001. "Information Gatekeepers on the Internet and the Competitiveness of Homogeneous Product Markets," American Economic Review, American Economic Association, vol. 91(3), pages 454-474, June. [Downloadable!] (restricted)
  5. Reinganum, Jennifer F, 1979. "A Simple Model of Equilibrium Price Dispersion," Journal of Political Economy, University of Chicago Press, vol. 87(4), pages 851-58, August. [Downloadable!] (restricted)
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  6. Rosenthal, Robert W, 1980. "A Model in Which an Increase in the Number of Sellers Leads to a Higher Price," Econometrica, Econometric Society, vol. 48(6), pages 1575-79, September. [Downloadable!] (restricted)
  7. Spulber, Daniel F, 1995. "Bertrand Competition When Rivals' Costs Are Unknown," Journal of Industrial Economics, Blackwell Publishing, vol. 43(1), pages 1-11, March. [Downloadable!] (restricted)
  8. Jeffrey R. Brown & Austan Goolsbee, 2002. "Does the Internet Make Markets More Competitive? Evidence from the Life Insurance Industry," Journal of Political Economy, University of Chicago Press, vol. 110(3), pages 481-507, June. [Downloadable!] (restricted)
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  9. Narasimhan, Chakravarthi, 1988. "Competitive Promotional Strategies," Journal of Business, University of Chicago Press, vol. 61(4), pages 427-49, October. [Downloadable!] (restricted)
  10. Stahl, Dale O, II, 1989. "Oligopolistic Pricing with Sequential Consumer Search," American Economic Review, American Economic Association, vol. 79(4), pages 700-712, September. [Downloadable!] (restricted)
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