Do Targeted Discount Offers Serve as Advertising? Evidence from 70 Field Experiments

Navdeep Sahni, Dan Zou and Pradeep Chintagunta
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Navdeep Sahni: Stanford University

Research Papers from Stanford University, Graduate School of Business

Abstract: The prevalence and widespread usage of email has given businesses a direct and cost effective way of providing consumers with targeted discount offers. While these discounts are expected to increase the demand for the promoted products, are they effective in increasing revenues? Do they have effects beyond acting as price reductions? We study these questions using individual-level data from 70 randomized experiments run by a large online ticket resale platform. We estimate the redemption rates of the offers and also measure the broader impact of emailed promotions by comparing purchases by individuals who received the experimental promotions with purchases by those who did not receive the offers because of the experimental randomization. We find that the offers cause the average expenditure to increase significantly, by $3.03 (a 37.2% increase) during the promotion window. However, the redemption rate of these offers is low. Importantly, ninety percent of these gains are not through redemption of the offers. The individuals who spent more on the platform in the past are more responsive to the offers; and the effect of the offers is significantly higher among individuals who did not transact on the platform in the year before the offer was given. Interestingly, the promotion causes carryover to the week after the promotion expires; we find that spending increases by $1.55 in the week after the offer expires. Additionally, we find evidence for cross category spillovers to non-promoted products--offers not applicable to a ticket genre cause an increase in spending in that genre. We conclude that emailed offers can serve as a form of "advertising" for the firm's products rather than tools of price discrimination.

Date: 2015-11
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