Mankiw's Principles of Economics textbooks continue to be the most popular and widely used text in the economics classroom. PRINCIPLES OF MACROECONOMICS, 4th Edition features a strong revision of content in all 23 chapters while maintaining the clear and accessible writing style that is the hallmark of the highly respected author. The 4th edition also features an expanded instructor's resource package designed to assist instructors in course planning and classroom presentation and full integration of content with Aplia, the leading online Economics education program. In the 4th edition Greg Mankiw has created a full educational program for students and instructors -- Experience Mankiw 4e. "I have tried to put myself in the position of someone seeing economics for the first time. My goal is to emphasize the material that students should and do find interesting about the study of the economy." - N. Gregory Mankiw.