Professor für Marketing, Innovation und E-Business, Universität Trier

CBIM RoundTable Professor of Marketing, Georgia State University

Professor of Marketing, Carlson School of Management, University of Minnesota

Professor of Marketing, Rouen Business School

Professor (Emeritus) of Business and Services Marketing, Freie Universitaet Berlin

O'Bleness Professor, Ohio University

Associate Professor, National University of Singapore

Professor of Marketing, Iowa State University

Professor of Marketing, University of Texas at El Paso

Professor of Marketing, Wright State University