This paper surveys competition problems in the search ads segment of the online advertising industry. We review the …

We develop a model with many advertisers (products) and many advertising markets (media). Each advertiser sells to a … different segment of consumers, and each medium has a different ability to target advertising messages. We characterize the … competitive equilibrium in the media markets and evaluate the implications of targeting in advertising markets.An increase in the …

In this paper, we explore the hypothesis that an important force behind the collapse in advertising revenue experienced … introduce a model of the market for advertising on news media outlets whereby news outlets are modeled as competing two … equilibrium outcomes in the advertising market. One consequence is that multi-homing on the part of advertisers is heterogeneous …