Follow the money : online piracy and self-regulation in the advertising industry

In this paper, we study the effects of a self-regulatory effort, orchestrated by the European Commission, that aims to reduce advertising revenues for publishers of copyright infringing content. Historical data lets us follow how the third-party advertising and tracking services associated with a large number of piracy websites and a corresponding set of legitimate "placebo" websites change after the agreement to self-regulate went in place. We find that larger EU-based advertisers comply with the initiative and reduce their connections with piracy websites. We do not find reductions for other non-advertising services that track consumers, which has potentially important implications for the efficiency of targeted advertising.