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Review of Network Economics

Editor-in-Chief: Grzybowski, Lukasz

Ed. by Briglauer, Wolfgang / Goetz, Georg / Pereira, Pedro

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Volume 15, Issue 1


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

Aurora García-Gallego
  • Corresponding author
  • LEE and Economics Department, Universitat Jaume I, Av. Sos Baynat s/n, 12006-Castellón, Spain
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Nikolaos Georgantzís
  • School of Agriculture, Policy and Development, University of Reading (UK) and LEE and Economics Department, Universitat Jaume I, Castellón, Spain
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Pedro Pereira / José C. Pernías-Cerrillo
Published Online: 2017-03-03 | DOI: https://doi.org/10.1515/rne-2016-0015


We analyze the impact on consumer prices of some information characteristics of price-comparison search platforms. An equilibrium model where vendors compete in prices and consumers do not observe prices, but can obtain price information through a search platform, is developed. The model generates several predictions about the impact on the price distribution of: (i) the size of the search platform’s sample, (ii) whether the search platform’s sample is random, and (iii) the number of vendors in the market. The model’s predictions are tested experimentally. The results confirm the predictions about (ii) and (iii), but reject the model’s predictions about (i).

Keywords: experiments; incomplete information; price competition; search platforms; selective information

JEL Classification: C91; D43; D83; L13


  • Armstrong, M., V. Vickers and J. Zhou (2009) “Prominence and Consumer Search,” RAND Journal of Economics, 40(2):209–233.CrossrefGoogle Scholar

  • Arnold, M., C. Li, C. Saliba and L. Zhang (2011) “Asymmetric Market Shares, Advertising, and Pricing: Equilibrium with an Information Gatekeeper,” Journal of Industrial Economics, 59(1):63–84.CrossrefGoogle Scholar

  • Athey, S. and G. Ellison (2011) Position Auctions with Consumer Search. Quarterly Journal of Economics, 126(3):1213–1270.CrossrefGoogle Scholar

  • Bagwell, K. and G. M. Lee (2014) “Number of Firms and Price Competition.” Research Collection School Of Economics, Singapore Management University.Google Scholar

  • Baye, M. and J. Morgan (2001) “Information Gatekeepers on the Internet and the Competitiveness of Homogeneous Product Markets,” American Economic Review, 91(3):454–474.CrossrefGoogle Scholar

  • Baye, M., D. Kovenock and C. Devries (1992) “It takes Two to Tango: Equilibria in a Model of Sales,” Games and Economic Behavior, 4:493–510.CrossrefGoogle Scholar

  • Benaïm, M., J. Hofbauer and E. Hopkins (2009) “Learning in Games with Unstable Equilibria,” Journal of Economic Theory, 144:1694–1709.CrossrefGoogle Scholar

  • Bradlow, E. and D. Schmittlein (1999) “The Little Engine that could: Modeling the Performance of World Wide Web Search Engines,” Marketing Science, 19(1):43–62.Google Scholar

  • Brown, J. and A. Goolsbee (2002) “Does the Internet make Markets more Competitive? Evidence from the Life Insurance Industry,” Journal of Political Economy, 110(3):481–507.CrossrefGoogle Scholar

  • Brynjolfsson, E. and M. Smith (2000) “Frictionless Commerce? A Comparison of Internet and Conventional Retailers,” Management Science, 46(4):563–585.CrossrefGoogle Scholar

  • Burdett, K. and K. Judd (1983) “Equilibrium Price Dispersion,” Econometrica, 51:955–969.CrossrefGoogle Scholar

  • Cason, T. N. and D. Friedman (2003) “Buyer Search and Price Dispersion: A Laboratory Study,” Journal of Economic Theory, 112:232–260.CrossrefGoogle Scholar

  • Chen, Y. and M. Riordan (2008) “Price-Increasing Competition,” RAND Journal of Economics, 39(4):1042–1058.CrossrefGoogle Scholar

  • Clay, K., R. Krishnan, E. Wolff and D. Fernandes (2002) “Retail Strategies on the Web: Price and Non-Price Competition in the Online Book Industry.” The Journal of Industrial Economics, 50(3):351–367.CrossrefGoogle Scholar

  • Clemons, E., I. Hann and L. Hitt (2002) “Price Dispersion and Differentiation in Online Travel: An Empirical Investigation,” Management Science, 48(4):534–549.CrossrefGoogle Scholar

  • Corniere, A. and G. Taylor (2014) “Integration and Search Engine Bias,” RAND Journal of Economics, 45(3):576–597.CrossrefGoogle Scholar

  • Dahlby, B., D. West (1986) “Price Dispersion in an Automobile Insurance Market,” Journal of Political Economy, 94(2):418–438.CrossrefGoogle Scholar

  • Dasgupta, P. and E. Maskin (1986) “The Existence of Equilibrium in Discontinuous Economic Games, I: Theory,” Review of Economic Studies, 53:1–26.CrossrefGoogle Scholar

  • De los Santos, B., A. Hortacsu and M. Wildenbeest (2013) “Testing Models of Consumer Search Behavior using Data on Web Browsing and Consumer Purchases,” American Economic Review, 102(6):2955–2980.Google Scholar

  • Dinlersoz, E. and P. Pereira (2007) “On the Diffusion of Electronic Commerce,” International Journal of Industrial Organization, 25(3):541–574.CrossrefGoogle Scholar

  • Ellison, G. and S. Ellison (2009) “Search, Obfuscation, and Price Elasticities on the Internet,” Econometrica, 77(2):427–452.CrossrefGoogle Scholar

  • Ellison, G. and A. Wolitzky (2012) “A Search Cost Model of Obfuscation,” RAND Journal of Economics, 45(3):417–441.CrossrefGoogle Scholar

  • Fischbacher U. (2007) “z-Tree: Zurich Toolbox for Readymade Economic Experiments,” Experimenter’s manual. Experimental Economics, 10(2):171–178.CrossrefGoogle Scholar

  • Fonseca, M. A. and H. T. Normann (2008) “Mergers, Asymmetries and Collusion: Experimental Evidence,” The Economic Journal, 118:387–400.CrossrefGoogle Scholar

  • Frank, R. and D. Salkever (1997) “Generic Entry and the Market for Pharmaceuticals,” Journal of Economic and Management Strategy, 6:75–90.Google Scholar

  • García-Gallego, A., N. Georgantzís, A. Jaramillo-Gutiérrez, P. Pereira and J. C. Pernías (2014) “Monopolistic Product Line Competition with Ex Post Consumer Heterogeneity,” Journal of Business Research, 67(5):795–801.Google Scholar

  • Grabowski, H. and J. Vernon (1992) “Brand Loyalty, Entry and Price Competition in Pharmaceuticals after the 1984 Drug Act,” Journal of Law and Economics, 35:331–350.Google Scholar

  • Guimarães, P. (1996) “Search Intensity in Oligopoly,” Journal of Industrial Economics, 44:415–426.CrossrefGoogle Scholar

  • Hagiu, A. and B. Jullien (2011) “Why do Intermediaries Divert Search?” RAND Journal of Economics, 42(2):337–362.CrossrefGoogle Scholar

  • Harrison, G. and P. Morgan (1990) “Search Intensity in Experiments.” Economic Journal, 100:478–486.CrossrefGoogle Scholar

  • Hopkins, E. and R. Seymour (2002) “The Stability of Price Dispersion under Seller and Consumer Learning,” International Economic Review, 43:1157–1190.CrossrefGoogle Scholar

  • Huck, S., Normann, H. T. and J. Oechssler (2004) “Two are few and Four are Many: Number Effects in Experimental Oligopolies,” Journal of Economic Behavior and Organization, 53:435–446.Google Scholar

  • Iyer, G. and A. Pazgal (2000) “Internet Shopping Agents: Virtual Co-Location and Competition,” Marketing Science, 22:85–106.CrossrefGoogle Scholar

  • Janssen, M. C. W. and J. L. Moraga-González (2004) “Strategic Pricing, Consumer Search and the Number of Firms,” Review of Economic Studies, 71:1089–1118.CrossrefGoogle Scholar

  • Lach, S. (2002) “Existence and Persistence of Price Dispersion: An Empirical Analysis,” The Review of Economics and Statistics, 84(3):433–444.CrossrefGoogle Scholar

  • Lawrence, S. and C. Giles (1998) “Searching the World Wide Web,” Science, 280(3):98–100.Google Scholar

  • Lawrence, S. and C. Giles (1999) “Accessibility of Information on the Web,” Nature, 400:107–109.CrossrefGoogle Scholar

  • Morgan, J., H. Orzen and M. Sefton (2006) “An Experimental Study of Price Dispersion,” Games and Economic Behavior, 54:134–138.CrossrefGoogle Scholar

  • Orzen, H. (2008) “Counterintuitive Number Effects in Experimental Oligopolies,” Experimental Economics, 11(4):390–401.CrossrefGoogle Scholar

  • Orzen, H. and M. Sefton (2008) “An Experiment on Spatial Price Competition,” International Journal of Industrial Organization, 26:716–729.CrossrefGoogle Scholar

  • Pereira, P. (2005) “Do Lower Search Costs Reduce Prices and Price Dispersion?” Information Economics and Policy, 17(1):61–72.CrossrefGoogle Scholar

  • Rosenthal, R. (1980) “A Model in which an Increase in the Number of Sellers Leads to a Higher Price,” Econometrica, 48:1575–1579.CrossrefGoogle Scholar

  • Samuelson, L. and J. Zhang (1992) “Search costs and Prices,” Economics Letters, 38:55–60.CrossrefGoogle Scholar

  • Schotter, A. and Y. Braunstein (1981) “Economic Search: An Experimental Study,” Economic Inquiry, 19(1):1–25.CrossrefGoogle Scholar

  • Seade, J. (1980) “On the Effects of Entry,” Econometrica, 48(2):479–489.CrossrefGoogle Scholar

  • Sorensen, A. (2000) “Equilibrium Price Dispersion in Retail Markets for Prescription Drugs,” Journal of Political Economy, 108(4):833–850.CrossrefGoogle Scholar

  • Stahl, D. (1989) “Oligopolistic Pricing with Sequential Consumer Search,” American Economic Review, 79:700–712.Google Scholar

  • Stigler, G. (1961) “The Economics of Information,” Journal of Political Economy, 69(3):213–225.CrossrefGoogle Scholar

  • Tang, Z., M. Smith and A. Montgomery (2010) “The Impact of Shopbot use on Prices and Price Dispersion: Evidence from Online Book Retailing,” International Journal of Industrial Organization, 28:579–590.CrossrefGoogle Scholar

  • Varian, H. (1980) “A Model of Sales,” American Economic Review, 70:651–659.Google Scholar

  • White, A. (2013) “Search Engines: Left Side Quality Versus Right Side Profits,” International Journal of Industrial Organization, 31(6):690–701.CrossrefGoogle Scholar

About the article

Corresponding author: Prof. Aurora García-Gallego, LEE and Economics Department, Universitat Jaume I, Av. Sos Baynat s/n, 12006-Castellón, Spain, Phone: +34-964387631

Published Online: 2017-03-03

Published in Print: 2017-05-24

Citation Information: Review of Network Economics, Volume 15, Issue 1, Pages 1–34, ISSN (Online) 1446-9022, ISSN (Print) 2194-5993, DOI: https://doi.org/10.1515/rne-2016-0015.

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