Gary Armstrong is Crist W. Blackwell Distinguished Professor Emeritus of Undergraduate Education in the Kenan-Flagler Business School at the University of North Carolina at Chapel Hill.

Philip Kotler is S.C. Johnson & Son Distinguished Professor of International Marketing at the Kellogg Graduate School of Management, Northwestern University.

Michael Harker is Lecturer in Marketing at the University of Strathclyde Business School, Glasgow.

Ross Brennan is a Professor of Industrial Marketing at the University of Hertfordshire Business School.