EC120 Chapter Notes - Chapter 2: Root Mean Square, Saving, Opportunity Cost

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6 Sep 2016
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EC120 Full Course Notes
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Economists devise theories, collect data, and then analyze these data in an attempt to verify or refute their theories. The dispassionate development and testing of theories about how the world works. An economist could use the scienti c method to prove that in ation occurs when a country prints too much money. Economists make assumptions because assumptions can simplify the complex world and make it easier to understand. To study international trade, assume that the world consists of two countries and each produces only two goods. Most assumptions are unrealistic, but simple to learn and provide useful insights. Economists use models, often composed of diagrams and equations, to learn about the world and study economic issues. Economic models omit many details (simplify reality) to allow us to see what is truly important. When developing theory, graphs provide a visual representation of the ideas. When analyzing data, graphs show a visual relationship between variables. Display information only on a single variable.

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