Mankiw's masterful textbook earns its widespread acclaim by covering macroeconomics as accessibly and concisely as possible, in a way that emphasizes the relevance of both the field's classical roots and its current practice. While achieving the same guiding objectives as previous editions, the new Fourth Edition offers refined discussions of every topic and incorporates important new ideas, data, and events throughout. In addition, the supplements package now includes a new Macroeconomics Companion Web site, featuring the new web-based version of David Weill's .