TIMOTHY L. KEININGHAM is Senior Vice President and Head of Consulting for Ipsos Loyalty. He is the author of several books and articles on customer satisfaction and loyalty, and has won best paper awards from the Journal of Marketing and the Journal of Service Research.

TERRY G. VAVRA is Chairman Emeritus of Ipsos Loyalty. He is a customer satisfaction and loyalty consultant, a public speaker on these subjects, and the author of four books (including one of the first books on CRM) and numerous articles in these fields. He is also a former educator who taught at the graduate level.

LERZAN AKSOY is Assistant Professor of Marketing at Koç University in Istanbul, Turkey. Her research interests include customer satisfaction, loyalty, and relationship management. She has provided executive training on customer relationship management to executives from numerous multinational companies.

HENRI WALLARD is CEO of Ipsos in charge of Ipsos Loyalty.