Philip M. Napoli is professor and the James R. Shepley Professor of Public Policy at the Sanford School of Public Policy at Duke University. His previous books include Audience Economics: Media Institutions and the Audience Marketplace (Columbia, 2003), and Audience Evolution: New Technologies and the Transformation of Media Audiences (Columbia, 2011). He is also the author of more than 90 articles in journals such as Communication Theory and Telecommunications Policy.