Ever wonder why colleges use GPAs, ACTs, and SATs for admission, how supply and demand play out on a freeway, what price has to do with being late to class, or how you pay for good weather? ECONOMICS, 13E answers these questions and more as you open the world of economic analysis. Detailed coverage explains how economists build theories to explain everyday life. Memorable examples from pop culture illustrate unexpected places economics occur and show you how economic forces link to everyday events. Short video lectures clarify key economic concepts, while longer Video Office Hours answer questions. In addition, "What's Wrong With this Diagram?", "Working with Diagrams," and "Progression Graphs" videos help you work with diagrams. Digital resources Aplia and MindTap with new Adaptive Test Prep also help you to assess your personal economic understanding.