Economics - 13th Edition Author:Richard G. Lipsey, Christopher T.S. Ragan, Paul Storer This study guide to the main text, "Economics", includes learning objectives, review and self-test questions, answers to multiple-choice questions, exercises, short problems, answers to chapter exercises, cases and case questions. The main text, "Economics", is also available in separate volumes, "Macroeconomics" and "Microeconomics".