Macroeconomics Principles and Tools Author:Arthur O'Sullivan For one-semester, freshman/sophomore level courses in Principles of Macroeconomics. — This modern principles text has a strong foundation in demand and supply, the most important topic in learning and teaching principles of economics. Its improved coverage of change in demand vs. change in quantity demanded (also in supply coverage) enables stude... more »nts to better visualize and truly understand the difference between these two fundamental concepts. In macroeconomics, a balanced presentation between long run and short run topics allow professors to cover the important issues of growth early, and gives them the flexibility to cover Keynesian material when they feel it is important.« less