About the author ANDREW P. SAGE is the Dean of the School of Information Technology and Engineering at George Mason University. He is also the first American Bank Professor of Information Technology. Dr. Sage is the Editor of the Wiley Series in Systems Engineering and is also author of a number of books, among them Economic Systems Analysis: Microeconomics for Systems Engineering, Engineering Management and Project Selection, a coauthor of Introduction to Computer Systems: Analysis, Design, and Applications and the editor of System Design for Human Interaction and the Concise Encyclopedia of Information Processing in Systems and Organizations. Dr. Sage received his PhD from Purdue University.