Essentials of Economics offers brief yet balanced coverage of basic microeconomic principles. The Fourth Edition provides readers with a view of economic theories through real-world examples and applications. Gregory explains numerous modern topics in a non-technical manner, including modern industrial organization, information economics, public choice, and adaptive and rational expectations. Strong coverage of Keynesian economics and modern aggregate supply and demand remain hallmarks of the text, while a conscious effort has been made to present arguments and evidence from all sides of every economic debate.