For courses in Intermediate Macroeconomics. A Unified Approach to Economic Theory Demonstrating a balanced treatment of both classical and Keynesian economics, Macroecomomics presents macroeconomic theory in a big-picture way. Comprehensive coverage makes it easy for instructors to align chapters to fit their own syllabi, and the text helps instructors prepare students to analyze real macroeconomic data used by policy makers and researchers. This text uses a unified approach based on a single economics model that provides students with a clear understanding of macroeconomics and its classical and Keynesian assumptions. The Ninth Edition features new applications, boxes, and problems throughout and reflects recent events and developments in the field in light of recent crises in the United States and Europe. MyEconLab(R) not included. Students, if MyEconLab is a recommended/mandatory component of the course, please ask your instructor for the correct ISBN and course ID. MyEconLab should only be purchased when required by an instructor. Instructors, contact your Pearson representative for more information. MyEconLab is an online homework, tutorial, and assessment product designed to personalize learning and improve results. With a wide range of interactive, engaging, and assignable activities, students are encouraged to actively learn and retain tough course concepts.