Starting with the Tenth Edition and continuing with the Eleventh,co-author Gary Yohe has thoroughly revised the text while retaining itstraditional strengths. Discussions remain accurate and clear, makinguse of engaging examples that draw on real-world applications tomotivate the presentation of theory. This revitalized classic promisesto continue to please instructors and their students. Gary Yohe is professor of economics at Wesleyan University and a collaborator at the Centre for Integrated Study of the Human Dimensions of Global Change at Carnegie Mellon University.