Professor of Electronic Commerce, Goethe-University, Frankfurt, Germany

Professor of Marketing

Professor of Strategic Marketing

Chair Professor of Sales & Marketing, Otto-Friedrich-Universität Bamberg

Professor für Marketing und BWL

Professor of Marketing, Hanken School of Economics

Department Head & Gerber/Taylor Professor of Marketing, University of Tennessee

Professor of Marketing - Bocconi University

Université Paris-Dauphine

Professorial Lecturer, Kogod School of Business, American University