PHILIP KOTLER is the S. C. Johnson Distinguished Professor of International Marketing at Northwestern University's Kellogg School of Management. One of the world's top authorities on marketing, he is also the author of thirty-five books, including Marketing Insights from A to Z, also from Wiley.

NANCY LEE, MBA, is President of Social Marketing Services, Inc., and a marketing professional with more than twenty years of experience. She is an adjunct faculty member at the University of Washington and Seattle University where she teaches marketing.