authorities) . On the user side of the market, prices are zero – "free." The other side, advertising rates are "hidden." Facebook …'s and Google's revenues are derived from advertising which appears when you go to their sites. They can extract exorbitant … privacy, political influences and advertising dominance. The argument for antitrust action against them is based on the …

other side, advertising rate are "hidden." Facebook's and Google's revenues are derived from advertising which appear when … digital advertising and one-third of total advertising. Nevertheless, no serious antitrust case or legislation has addressed …

The last decades have seen large improvements in digital advertising technology that allowed firms to better target … specific consumer tastes. This research studies the relationship among digital advertising, the rise of varieties, and economic … welfare. We develop a model of advertising and varieties where firms choose the intensity of digital ads directed at specific …

issuing disclaimers. …