Ever wonder why you have the number of friends that you do? . . . If a tax on soda would really reduce obesity? . . . What is going on with the financial problems in Greece? . . . or whether a tax rebate is better than a tax bonus? ECONOMICS answers these questions and many more. Using intriguing pop culture examples, the eleventh edition is revised to include the most comprehensive coverage of the financial and economic crisis available in a principles of economics text. Self-tests help determine how well you're grasping the concepts, and CourseMate for Economics offers a graphing tutorial, quizzes, videos and more. It's all carefully designed to help you get the best grade possible! Building on the Video Office Hours lectures developed by the author for the tenth edition, the eleventh edition features two entirely new video types--See It Solved and GraphIt! See It Solved videos walk you through a worked problem, similar to those found at the end of each chapter, providing an ideal study tool for reference as you do homework. GraphIt! videos demonstrate key concepts in graphing in short (averaging three to five minutes) video pieces that can be played and replayed to see how the graphs are built.