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This question tests your understanding of the differences between microeconomics and macroeconomics.
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So let us talk about what microeconomics is.
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Microeconomics is a study of how agents make decisions.
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The keyword here is agents.
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Who is an economic agent? that could just be one person.
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For example, you are an economic agent.
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There could also be a group of people, for example, a family or a household, or a group of friends, or any other group of people that you can imagine.
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There could also be something bigger, such as a firm or an organization.
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So these are all economic agents.
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And now that we want to solve this question, we need to figure out whether each of these studies have economic agents.
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Making decisions.
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So let us first refer to part a.
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The impact of cigarette taxes and the smoking behavior of teenagers...