Professor of Marketing, Vice Rector at the Univ. of Cologne

Professor of marketing New York University

Professor of Travel Industry Management at the University of Hawaii at Manoa

Professor Emeritus of Marketing, San Diego State University and University of Akron

California State University, Long Beach

Assistent Professor of Communication Management, Ghent University

Northeastern University

Professor, University of South Australia

Ehrenberg-Bass Institute, University of South Australia

Leuphana University Lueneburg