About the Author

Gary L. Lilien is Distinguished Research Professor of Management Science at the Smeal College of Business at Penn State. He is also cofounder and Research Director of the ISBM. He is the author or co-author of twelve books (including Marketing Models with Phil Kotler, Marketing Engineering and Principles of Marketing Engineering), as well as over 100 professional articles. He is on the editorial board of the International Journal for Research in Marketing; is functional Editor for Marketing for Interfaces, and is Area Editor at Marketing Science. He was Editor in chief of Interfaces for six years. He is an Inaugural INFORMS Fellow, was honored as Morse Lecturer for INFORMS and also received the Kimball medal for distinguished contributions to the field of operations research. He is on the Board of Directors of the American Marketing Association.

Arvind Rangaswamy is Senior Associate Dean and Anchel Professor of Marketing at Penn State. Prof. Rangaswamy has published numerous articles in such leading journals as Marketing Science, Journal of Marketing Research, Journal of Marketing, Management Science, Information Systems Research, Service Science, International Journal of Research in Marketing, Marketing Letters, Psychometrika, Multivariate Behavioral Research, and Journal of Economics and Statistics. He was an Area Editor for Marketing Science (1997-2011) and serves on the editorial boards of the Journal of Interactive Marketing; International Journal of Intelligent Systems in Accounting, Finance and Management; Journal of Service Research; Journal of Business-to-Business Marketing; and Journal of Electronic Commerce.

Arnaud De Bruyn is Professor of Marketing and Head of the Marketing Department at ESSEC Business School, Paris, France, and Associate Director for the Marketing Engineering Program at the Institute for the Study of Business Markets at Penn State. His work has been published in Marketing Science, Management Science, International Journal of Research in Marketing, Information Systems Research, etc., and serves on the editorial board of IJRM, Journal of Interactive Marketing and RAM. His work on the quantitative analysis of viral marketing behavior, co-authored with Gary Lilien, has won the IJRM Best Paper Award.