The fourth edition of this widely-used text relates theory to practice in the public policy process. In a clear, conversational style, author Tom Birkland conveys the best current thinking on the policy process with an emphasis on accessibility and synthesis. This new edition has been reorganized to better explain the role of policy analysis in the policy process. New to this edition: * A new section on the role of policy analysis and policy analysts in the policy process. * A revised and updated chapter surveying the social, economic, and demographic trends that are transforming the policy environment. * Fully updated references to help the advanced reader locate the most important theoretical literature in policy process studies. * New illustrations and an improved layout to clarify key ideas and stimulate classroom discussion. The book makes generous use of visual aids and examples that link policy theory to the concrete experience of practitioners. It includes chapter-at-a-glance outlines, definitions of key terms, provocative review questions, recommended reading, and online materials for professors and students.