competition "either or both." A central result is that platform ownership does not affect advertising levels, despite nontrivial …This paper develops a fairly general model of platform competition in media markets allowing viewers to use multiple … platforms. This leads to a new form of competition between platforms, in which they do not steal viewers from each other, but …

advertising to signal product quality. I present an equilibrium model that describes both consumers' and firms' learning and … decision-making under quality uncertainty. My model allows me to distinguish between two roles of informative advertising … advertising and social learning are two main factors for a new movie's success. The structural estimates imply that movie studios …

, advertising can serve as a signal of product quality for experience goods. As such, advertising might help skilled new freelancers … explores the role of advertising in online labor markets using transactional data from a major platform. While indeed newer …. Taken together, my results contrast the hypotheses derived from signaling models of advertising. …

image and may therefore yield higher welfare than competition. Policy options to remedy the efficiency losses are discussed. …