ECON101 Chapter Notes - Chapter 2: Scientific Method, Natural Experiment

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Chapter 2: economic methods and economic questions (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) A model is a simplified description of reality. Economists use data to evaluate the accuracy of models and understand how the world works. Experiments help economists measure cause and effect. Economic research focuses on questions that are important to society and can be answered with models in data. Model: simplified description, or representation, of the world; sometimes, economists will refer to a model as a theory. All scientific models make predictions that can be checked with data. Data: facts, measurements, or statistics that describe the world. Returns-to-education model describes the economic payoff of more education. A model is an approximation for what is predicted to happen for most people in most circumstances. A model makes predictions that can be tested with data. Mean (average): the sum of all the different values divided by the number of values and is a commonly used technique for summarizing data.

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