Who will control markets and gain riches? Is the playing field level or slanted? Is there open, effective, creative competition, or instead monopoly with its controls and exclusions? These issues--at the heart of economic striving and progress and involving the very largest commercial interests--are carefully explored in this highly regarded volume, now available from Waveland Press. The Fourth Edition of The Economics of Industrial Organization teaches students to think independently in judging complex issues that do not have definitive research answers. As the author states, "Mastering the concepts and techniques--and unruly facts--is task 1; applying them skillfully, to form independent judgments, is the mature task 2." The book lays out the core topics in their natural order, in a format carefully tested in the author's various classrooms over many years of teaching. Its emphasis on independent judgment is one feature; another is the basic format that allows for flexibility. Many choices can be made in topic emphasis, order of subjects, and depth of detail. Still another feature is the many compact case studies offered in chapters 13 and 14.