The impressive growth of online shopping has had a significant impact on firms’ strategies and customer behavior, bringing to the fore new forms of trademark exploitation that may affect competition. A prominent role is played by keyword advertising services provided by internet search...

Differential Privacy offers the online advertising industry new means to increase consumer privacy by obfuscating consumer data. While achieving the same privacy, these means decrease targeting accuracy differently, subsequently reducing advertisers’ willingness to pay (WTP) for targeted...

This paper provides a comprehensive study of the structure and dynamics of online advertising markets, mostly based on techniques from the emergent discipline of complex systems analysis. First, we look at how the display rank of a URL link influences its click frequency, for both sponsored...

Advertising on e-commerce marketplaces, wherein sponsored product listings are interleaved with organic product listings, is a large and growing phenomenon. In this paper, we both theoretically and empirically study whether including sponsored listings improves or hurts the overall quality and...

We examine how policies for the ownership and control of consumer-generated data affect market outcomes in the online advertising industry. When advertisers have strong property rights over data regarding consumers' active purchase interests, competition between ad exchanges leads to too little...

The phenomenon of paid search advertising has now become the most predominant form of online advertising in the marketing world. However, we have little understanding of the impact of search engine advertising on consumers' responses in the presence of organic listings of the same firms. In this...

Standard search models assume that consumers actively decide on the order, identity, and number of products they search. We document that online, a large fraction of searches happen in a more passive manner, with consumers merely reacting to online advertisements that do not allow them to choose...

Yahoo! Research partnered with a nationwide retailer to study the effects of online display advertising on both online and in-store purchases. We use a randomized field experiment on 3 million Yahoo! users who are also past customers of the retailer. We find statistically significant evidence...

Channel coordination in search advertising is an important but complicated managerial decision for both manufacturers and retailers. Due to the highly concentrated market of search advertising, a manufacturer's and its retailers' ads can compete instead of complement with each other. We consider...

Click fraud is the practice of deceptively clicking on search ads with the intention of either increasing third-party website revenues or exhausting an advertiser's budget. Search advertisers are forced to trust that search engines do everything possible to detect and prevent click fraud even...