Prof, Paderborn University, media and communication studies, editor of the journal tripleC

Professor of Economics, UC Berkeley

University of Minnesota, Carlson School of Management and Department of Economics

Reuters Institute, University of Oxford

Hearst Professor of Communication, Stanford

Carson Professor of Business, Columbia Business School

Professor of Media Economics, University of Glasgow

ICREA-Universitat Pompeu Fabra, Barcelona IPEG, New Economic School,

ICREA Research Professor, Universitat Pompeu Fabra, Barcelona IPEG, Barcelona GSE …

Doyle Professor in Public Policy, Emeritus, Stanford University