John J. Coyle is director of corporate relations for the Center for Supply Chain Research and professor emeritus of supply chain and information systems at Penn State University. The author of more than 100 publications in the areas of transportation and logistics, Professor Coyle has presented papers on these topics at such professional meetings as the Council of Logistics Management, the American Marketing Association, the National Academy of Sciences, the Transportation Research Forum, and the Southern Marketing Association. In addition to TRANSPORTATION, he also coauthors best-selling THE