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 ye...