Prioritization vs zero-rating: Discrimination on the internet

This paper analyzes two business practices on the mobile internet market, paid prioritization and zero-rating. These practices allow the internet service provider to discriminate different content types. With prioritization, the ISP delivers content at different speeds; with zero-rating, the ISP charges different prices. In recent years these practices have attracted considerable media attention and regulatory interest. When the asymmetry between content providers is limited, in particular with regard to their ability to attract traffic or to monetize it, we first show that the ISP can extract more surplus from consumers by privileging the relatively weaker content and restoring symmetry between content providers. Next, we show that the ISP chooses prioritization when traffic is highly valuable for content providers and congestion is severe, and zero-rating in all other cases. Finally, we find that a policy banning prioritization can lead to zero-rating and a reduction in consumer surplus.