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T his paper examines the effect of recommender systems on the diversity of sales. Two anecdotal views exist about such effects. Some believe recommenders help consumers discover new products and thus increase sales diversity. Others believe recommenders only reinforce the popularity of already-popular products. This paper seeks to reconcile these seemingly(More)
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation Abstract: A primary tool that consumers have for comparative shopping are shopbots, which is short for shopping robots. These shopbots automatically search a large number(More)
Content Delivery Networks (CDNs) are a vital component of the Internet's content delivery value chain, servicing nearly a third of the Internet's most popular content sites. However, in spite of their strategic importance little is known about the optimal pricing policies or adoption drivers of CDNs. We address these questions using analytic models of the(More)
An important problem in search engine advertising is key-word<sup>1</sup> generation. In the past, advertisers have preferred to bid for keywords that tend to have high search volumes and hence are more expensive. An alternate strategy involves bidding for several related but low volume, inexpensive terms that generate the same amount of traffic(More)
The Internet is by all accounts an incredible success, but in spite or maybe because of this success, its deficiencies have come under increasing scrutiny and triggered calls for new architectures to succeed it. Those architectures will, however, face a formidable incumbent in the Internet, and their ability to ultimately replace it is likely to depend(More)
We study the impact of changes in the position of competing listings in organic search results on the performance of sponsored search advertisements. Using data for several keywords from an online retailer's ad campaign, we measure the impact of organic competition on both click-through rate and conversion rate of sponsored search ads for these keywords. We(More)
New network technologies constantly seek to displace incumbents. Their success depends on technological superiority, the size of the incumbent's installed base, users' adoption behaviors, and various other factors. The goal of this paper is to develop an understanding of competition between network technologies and identify the extent to which different(More)
Content Delivery Networks (CDNs) intelligently cache content on behalf of content providers and deliver this content to end users. New services have been rolled out recently by CDNs that enable content providers to deliver entire web sites from the distributed CDN servers. Using analytical models, we address the optimal pricing of these services. Our(More)