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An Empirical Model of Search with Vertically Differentiated Products

Author

Listed:
  • Matthijs R Wildenbeest

    (Department of Business Economics and Public Policy, Indiana University Kelley School of Business)

Abstract
This paper presents a non-sequential search model that allows for vertical product differentiation. In the unique symmetric equilibrium firms with different characteristics draw utilities from a common utility distribution, resulting in asymmetric price distributions. The model therefore provides a theoretical rationale for explaining price dispersion as a result of quality differences and search frictions together. More specifically, the model can explain the frequent and asymmetric price changes reported in several empirical papers, but also why some firms have persistently higher prices than others. Using the equilibrium conditions derived from the model, we show how to estimate search costs by maximum likelihood using only prices. The method is applied to a data set of prices for grocery items from supermarkets in the UK. Estimates reveal that most of the observed price variation can be explained by supermarket heterogeneity and that the estimated amount of search is low in this market. We show that ignoring vertical product differentiation results in an overestimation of search costs. Moreover, estimated search costs using a basket of organic items are on average higher than that of a similar non-organic basket. We also simulate how changes in search costs will affect behavior of stores and consumers.

Suggested Citation

  • Matthijs R Wildenbeest, 2009. "An Empirical Model of Search with Vertically Differentiated Products," Working Papers 2009-01, Indiana University, Kelley School of Business, Department of Business Economics and Public Policy.
    • Handle: RePEc:iuk:wpaper:2009-01
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    File URL: http://kelley.iu.edu/riharbau/RePEc/iuk/wpaper/bepp2009-01-wildenbeest.pdf
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    References listed on IDEAS

    as
    1. Daniel Hosken & David Reiffen, 2004. "Patterns of Retail Price Variation," RAND Journal of Economics, The RAND Corporation, vol. 35(1), pages 128-146, Spring.
    2. Ali Hortaçsu & Chad Syverson, 2004. "Product Differentiation, Search Costs, and Competition in the Mutual Fund Industry: A Case Study of S&P 500 Index Funds," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 119(2), pages 403-456.
    3. Asher Wolinsky, 1986. "True Monopolistic Competition as a Result of Imperfect Information," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 101(3), pages 493-511.
    4. Matthew Lewis, 2008. "Price Dispersion And Competition With Differentiated Sellers," Journal of Industrial Economics, Wiley Blackwell, vol. 56(3), pages 654-678, September.
    5. Morgan, Peter & Manning, Richard, 1985. "Optimal Search," Econometrica, Econometric Society, vol. 53(4), pages 923-944, July.
    6. Saul Lach, 2002. "Existence And Persistence Of Price Dispersion: An Empirical Analysis," The Review of Economics and Statistics, MIT Press, vol. 84(3), pages 433-444, August.
    7. Damon Wingfield & Philip Gooding, 2008. "CPI and RPI: the 2008 basket of goods and services," Economic & Labour Market Review, Palgrave Macmillan;Office for National Statistics, vol. 2(4), pages 25-31, April.
    8. Philip A. Haile & Han Hong & Matthew Shum, 2003. "Nonparametric Tests for Common Values at First-Price Sealed-Bid Auctions," NBER Working Papers 10105, National Bureau of Economic Research, Inc.
    9. An, Yonghong & Hu, Yingyao & Shum, Matthew, 2010. "Estimating first-price auctions with an unknown number of bidders: A misclassification approach," Journal of Econometrics, Elsevier, vol. 157(2), pages 328-341, August.
    10. Mark Armstrong, 2008. "Interactions between Competition and Consumer Policy," CPI Journal, Competition Policy International, vol. 4.
    11. Martin Pesendorfer, 2002. "Retail Sales: A Study of Pricing Behavior in Supermarkets," The Journal of Business, University of Chicago Press, vol. 75(1), pages 33-66, January.
    12. Howard Smith, 2004. "Supermarket Choice and Supermarket Competition in Market Equilibrium," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 71(1), pages 235-263.
    13. Burdett, Kenneth & Judd, Kenneth L, 1983. "Equilibrium Price Dispersion," Econometrica, Econometric Society, vol. 51(4), pages 955-969, July.
    14. Reinganum, Jennifer F, 1979. "A Simple Model of Equilibrium Price Dispersion," Journal of Political Economy, University of Chicago Press, vol. 87(4), pages 851-858, August.
    15. Michael R. Baye & John Morgan & Patrick Scholten, 2004. "Price Dispersion In The Small And In The Large: Evidence From An Internet Price Comparison Site," Journal of Industrial Economics, Wiley Blackwell, vol. 52(4), pages 463-496, December.
    16. Howard Smith, 2006. "Store Characteristics in Retail Oligopoly," RAND Journal of Economics, The RAND Corporation, vol. 37(2), pages 416-430, Summer.
    17. Moraga-González, José Luis & Wildenbeest, Matthijs R., 2008. "Maximum likelihood estimation of search costs," European Economic Review, Elsevier, vol. 52(5), pages 820-848, July.
    18. Michael R. Baye & John Morgan & Patrick Scholten, 2006. "Information, Search, and Price Dispersion," Working Papers 2006-11, Indiana University, Kelley School of Business, Department of Business Economics and Public Policy.
    19. Maarten C. W. Janssen & José Luis Moraga-González, 2004. "Strategic Pricing, Consumer Search and the Number of Firms," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 71(4), pages 1089-1118.
    20. Howard Smith, 2006. "Store characteristics in retail oligopoly," RAND Journal of Economics, RAND Corporation, vol. 37(2), pages 416-430, June.
    21. Han Hong & Matthew Shum, 2006. "Using Price Distributions to Estimate Search Costs," RAND Journal of Economics, The RAND Corporation, vol. 37(2), pages 257-275, Summer.
    22. Han Hong & Matthew Shum, 2006. "Using price distributions to estimate search costs," RAND Journal of Economics, RAND Corporation, vol. 37(2), pages 257-275, June.
    23. De los Santos, Babur, 2018. "Consumer search on the Internet," International Journal of Industrial Organization, Elsevier, vol. 58(C), pages 66-105.
    24. Patrick Bajari & Stephanie Houghton & Steve Tadelis, 2006. "Bidding for Incomplete Contracts: An Empirical Analysis," NBER Working Papers 12051, National Bureau of Economic Research, Inc.
    25. Matt Shum & Phil Haile & Han Hong, 2003. "Nonparametric Tests for Common Values in First-Price Auctions," Economics Working Paper Archive 501, The Johns Hopkins University,Department of Economics.
    26. Stahl, Dale O, II, 1989. "Oligopolistic Pricing with Sequential Consumer Search," American Economic Review, American Economic Association, vol. 79(4), pages 700-712, September.
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    More about this item

    Keywords

    consumer search; product differentiation; price dispersion; structural estimation;
    All these keywords.

    JEL classification:

    • C14 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Semiparametric and Nonparametric Methods: General
    • 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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