Dr. Johnston is Professor of Marketing at the Roy E. Crummer Graduate School of Business, Rollins College in Winter Park, Florida. He earned his Ph.D. in Marketing in 1986 from Texas A&M University. Prior to receiving his doctorate he worked in industry as a sales representative for a leading distributor of photographic equipment. His research has resulted in published articles in a number of professional journals such as Journal of Marketing Research, Journal of Applied Psychology, and Journal of Personal Selling and Sales Management and many others. He is also co-author of Sales Force Management 6E (Churchill, Ford, Walker, Johnston, Tanner) published by Irwin McGraw-Hill. He has been retained as a marketing consultant for firms in the personal health care, chemical, transportation, service, and telecommunications industries. A partial list of organizations that Dr. Johnston has conducted market research for in the past includes AT&T, American Airlines, Walt Disney World, and the American Red Cross. In addition, he has consulted on a wide range of issues involving strategic decision-making, quality assessment, market analysis, sales training, and international market decisions. Finally, he has conducted a number of seminars around the world on a variety of topics including motivation, managing turnover in the organization, sales training issues, ethical issues in marketing, and improving overall sales performance.Marshall, Greg W. is the author of 'Marketing Management', published 2009 under ISBN 9780073529790 and ISBN 0073529796.