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Promotions and the pattern of grocery shopping time


  • Jeongwen Chiang
  • Ching-Fan Chung
  • Emily Cremers


The histograms of interpurchase times for frequently purchased packaged goods have consistently shown pronounced seven-day cycles. Evidence supports that the weekly spike phenomenon is the result of consumers' regular shopping trip schedules. We explore the implications of this peculiar regularity on the issue of consumer purchase timing acceleration. Data for five product categories are examined. Promotions are found to have little effect in accelerating purchase timing. In contrast, conventional interpurchase time models are shown to overstate the effect of promotions.

Suggested Citation

  • Jeongwen Chiang & Ching-Fan Chung & Emily Cremers, 2001. "Promotions and the pattern of grocery shopping time," Journal of Applied Statistics, Taylor & Francis Journals, vol. 28(7), pages 801-819.
  • Handle: RePEc:taf:japsta:v:28:y:2001:i:7:p:801-819
    DOI: 10.1080/02664760120074997

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    References listed on IDEAS

    1. Fred S. Zufryden, 1978. "An Empirical Evaluation of a Composite Heterogeneous Model of Brand Choice and Purchase Timing Behavior," Management Science, INFORMS, vol. 24(7), pages 761-773, March.
    2. Dipak C. Jain & Naufel J. Vilcassim, 1991. "Investigating Household Purchase Timing Decisions: A Conditional Hazard Function Approach," Marketing Science, INFORMS, vol. 10(1), pages 1-23.
    3. Kiefer, Nicholas M, 1988. "Economic Duration Data and Hazard Functions," Journal of Economic Literature, American Economic Association, vol. 26(2), pages 646-679, June.
    4. Scott A. Neslin & Caroline Henderson & John Quelch, 1985. "Consumer Promotions and the Acceleration of Product Purchases," Marketing Science, INFORMS, vol. 4(2), pages 147-165.
    5. Kristiaan Helsen & David C. Schmittlein, 1993. "Analyzing Duration Times in Marketing: Evidence for the Effectiveness of Hazard Rate Models," Marketing Science, INFORMS, vol. 12(4), pages 395-414.
    6. Jeongwen Chiang, 1995. "Competing Coupon Promotions and Category Sales," Marketing Science, INFORMS, vol. 14(1), pages 105-122.
    7. Brian Gould, 1997. "Consumer promotion and purchase timing: the case of cheese," Applied Economics, Taylor & Francis Journals, vol. 29(4), pages 445-457.
    8. Donald G. Morrison & David C. Schmittlein, 1981. "Predicting Future Random Events Based on Past Performance," Management Science, INFORMS, vol. 27(9), pages 1006-1023, September.
    9. Gonul, F. & Srinivasan, K., 1993. "Consumer Purchase Behavior in a frequently Bought Product Category: Estimation Issues and Managerial Insights from a Hazard Function Model with Heterogeneity," University of Chicago - Economics Research Center 93-1, Chicago - Economics Research Center.
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    Cited by:

    1. Kuchler, Fred & Tegene, Abebayehu, 2006. "Did Bse Announcements Reduce Beef Purchases?," Economic Research Report 7251, United States Department of Agriculture, Economic Research Service.
    2. repec:pal:jorsoc:v:56:y:2005:i:11:d:10.1057_palgrave.jors.2601972 is not listed on IDEAS
    3. Marko Sarstedt & Sebastian Scharf & Alexander Thamm & Michael Wolff, 2010. "Die Prognose von Serviceintervallen mit der Hazard-Raten-Analyse – Ergebnisse einer empirischen Studie im Automobilmarkt," Metrika: International Journal for Theoretical and Applied Statistics, Springer, vol. 20(3), pages 269-283, April.
    4. Govert Bijwaard, 2010. "Regularity in individual shopping trips: implications for duration models in marketing," Journal of Applied Statistics, Taylor & Francis Journals, vol. 37(11), pages 1931-1945.

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