Joseph Turow, called by the New York Times "probably the reigning academic expert on media fragmentation," is Robert Lewis Shayon Professor and Associate Dean for Graduate Studies at the Annenberg School for Communication, University of Pennsylvania. He is the the author of Breaking Up America: Advertisers and the New Media World, among other books, and the editor of The Wired Homestead (MIT Press, 2003).

Andrea L. Kavanaugh is Senior Research Scientist and Assistant Director at the Human Computer Interaction Center, Department of Computer Science, Virginia Polytechnic Institute and State University.