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Understanding Consumer Reactions to Assortment Unavailability

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new buyers generate 28% of the sales in the control s<strong>to</strong>re and 38% in the test s<strong>to</strong>res, which is a<br />

significant difference (p < 0.01). A possible explanation for this finding is that the reduced<br />

assortment enhanced search efficiency and thereby attracted more new buyers than did the<br />

nonreduced assortment. In an additional study executed within the test s<strong>to</strong>res, we verify if the<br />

reduced assortment created more search efficiency.<br />

4.6 Additional study<br />

To further understand the sales effects we uncovered, we conducted an additional study in which<br />

we investigated whether perceived assortment variety, perceived search efficiency, assortment<br />

satisfaction, and actual search time change due <strong>to</strong> assortment reductions. Search efficiency in<br />

particular might be increased, whereas search time might be decreased. These changes may in<br />

turn explain why we find a significant increase in category sales from new buyers in the test<br />

s<strong>to</strong>res.<br />

4.6.1. Research methodology<br />

Data collection. In the two test s<strong>to</strong>res, we collected data one week before and twelve weeks after<br />

the assortment reduction. 19 Cus<strong>to</strong>mers were observed by experienced interviewers from a<br />

research agency as they made their detergent purchases. Directly after the cus<strong>to</strong>mer bought the<br />

detergent, the interviewer contacted this buyer <strong>to</strong> determine whether he or she would participate<br />

in this study. In <strong>to</strong>tal, 333 respondents participated in the in-s<strong>to</strong>re survey (before purchase: 179,<br />

after purchase: 154; <strong>to</strong>tal response percentage 65%).<br />

To assess whether the participants in the before and after surveys had the same<br />

background, we collected demographic variables such as gender, age, and household size, as<br />

well as buying behavior variables such as primary buyer, s<strong>to</strong>re loyalty, s<strong>to</strong>re visit frequency, and<br />

detergent buying frequency. Using pairwise t-tests and chi-square tests, we did not find any<br />

significant differences between the two samples for these variables.<br />

19 Given an interpurchase time of approximately four weeks for detergents, we conduct the after-purchase<br />

survey twelve weeks after the delisting <strong>to</strong>ok place <strong>to</strong> give consumers enough time <strong>to</strong> get used <strong>to</strong> the new<br />

shelf.<br />

112

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