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Investigating Behavioral Explanations for Asymmetric Price Competition

  • Makoto Abe

    (Faculty of Economics, University of Tokyo)

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    Asymmetric price competition in consumer packaged goods is a well-known phenomenon. Researchers have proposed three behavioral explanations: (1) heterogeneity in consumer preference, (2) the income effect, and (3) the reference and loss-aversion effects. These explanations have been offered independently by different researchers using different types of data with different methodology. Despite the interest in asymmetric price competition by the marketing community, no attempt has been made to compare across the three explanations and draw an inference on which one is most likely. The objectives of this paper are three-folds. Firstly, important factors when studying asymmetric price competition are discussed. These include, (1) confounding of the supply-side and demand-side factors when analyzing aggregate data, such as market share, and (2) an appropriate measure for asymmetric price competition as the change in market share of a brand for a unit price change of a competing brand. Second, based on these considerations, theoretical arguments against previous explanations are provided. (1) The Heterogeneity Effect: Aggregate data is analyzed and cross-price elasticity is used. The explanation is inferred indirectly. (2) Income effect: Infinite divisibility of goods is assumed. (3) Loss-aversion effect: Household heterogeneity is not well accounted for. These claims are then supported empirically using scanner-panel data from four categories. Third, an alternative explanation is proposed to show that a basic assumption of consumer utility in Microeconomic theory, the diminishing-marginal-return effect in price, results in asymmetric competition. It was shown that the concavity (i.e., the diminishing-marginal-return effect) in price was stronger than that of logarithm in all four product categories.

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    File URL: http://www.cirje.e.u-tokyo.ac.jp/research/dp/2001/2001cf125.pdf
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    Paper provided by CIRJE, Faculty of Economics, University of Tokyo in its series CIRJE F-Series with number CIRJE-F-125.

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    Length: 55 pages
    Date of creation: Jul 2001
    Date of revision:
    Handle: RePEc:tky:fseres:2001cf125
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    1. Winer, Russell S, 1986. " A Reference Price Model of Brand Choice for Frequently Purchased Products," Journal of Consumer Research, University of Chicago Press, vol. 13(2), pages 250-56, September.
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