The Sixth Edition of this introduction to principles of economics again integrates the public choice theme with a discussion of basic economic issues, while including many new analyses of domestic policies, and proposals and current global events. The free market approach begins in Chapter One with a condensed and accessible discussion contrasting market and non-market institutions, and is carried throughout the text. The Sixth Edition features a tightened exposition of microeconomics, more coverage of environmental economics and the economics of information, many new applications, and the addition of Internet-based exercises to each chapter. *Public choice theme: market-oriented approach integrated throughout *Academic rigor, yet exceptionally clear writing/exposition; excellent topic selection leads to a comprehensive but not encyclopedic presentation *Excellent array of applications and examples, many of them international in focus *Heightened coverage of the environment: new material on the economics of information *Addition of Internet-based exercises to each chapter