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Optimal Keyword Bids in Search-Based Advertising with Stochastic Advertisement Positions
Authors:Susan Cholette  Özgür Özlük  Mahmut Parlar
Institution:(1) San Francisco State University, San Francisco, CA 94132, USA;(2) DeGroote School of Business, McMaster University, Hamilton, Ontario, L8S 4M4, Canada;
Abstract:US expenditures on search-based advertising exceeded $12 billion in 2010. Advertisers bid for keywords, where bid price determines ad placement, affecting click-through and conversion rates. Advertisers must select keywords, allocating each a proportion of their fixed daily budget. In this paper, we construct a stochastic model for the selection and allocation process. We provide analytical results for the single-keyword problem and examine the multiple-keyword problem numerically. We investigate trade-offs between keywords given varying levels of risk and return. We show the implications of enforcing a probabilistic budget constraint. Our paper provides a critical analysis of the advertiser’s problem that may guide future research.
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