1、 Principles of Economics 3e SENIOR CONTRIBUTING AUTHORS DAVID SHAPIRO,PENNSYLVANIA STATE UNIVERSITY DANIEL MACDONALD,CALIFORNIA STATE UNIVERSITY,SAN BERNADINO STEVEN A.GREENLAW,UNIVERSITY OF MARY WASHINGTON OpenStax Rice University 6100 Main Street MS-375 Houston,Texas 77005 To learn more about Open
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16、udy guides.Our books are free and flexible,forever.Get started at openstax.org/details/books/principles-economics-3eCONTENTSPreface1CHAPTER 1Welcome to Economics!9Introduction91.1 What Is Economics,and Why Is It Important?101.2 Microeconomics and Macroeconomics151.3 How Economists Use Theories and Models to Understand Economic Issues161.4 How To Organize Economies:An Overview of Economic Systems18Key Terms24Key Concepts and Summary24Self-Check Questions25Review Questions25Critical Thinking Quest
