Digital advertising markets are growing and attracting increased scrutiny. This paper explores four market … inefficiencies that remain poorly understood: ad effect measurement, frictions between and within advertising channel members, ad … blocking and ad fraud. These topics are not unique to digital advertising, but each manifests in new ways in markets for …

I develop and compute a dynamic model of search in internet advertising. Micro-level browsing data from Microsoft …

superior firm enters the agreement only if it results in a large enough increase in demand for advertising space at the … share, the agreement is beneficial for the inferior firm, as the later firm's additional revenues from a higher advertising …' interests and to be detrimental to users' welfare. -- Search engine ; two-sided market ; advertising ; strategic complements …