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Thank you. The purpose of the passage will not be using the same words as mentioned in the passage. GMAT requires that you apply logic and critical reasoning to answer questions.

If it were trade off, what kind of trade-off analysis does the passage provide in your opinion? The way I see it, the passage uses pollution as an example of a concept, not for the purpose of analysis with specifics.

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Hello, how is this not a trade off as the last line states "the social or total costs of production are larger than the private costs." Instead Government intervention is not even mentioned in the passage barring the last line of first paragraph and the entire passage is devoted to social and private costs.
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I don't get the point "How they justifies government intervention". Is this an assumption we have to consider? Cause in whole passage, the author discussed externalities, the government part I don't understand.
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krrishabh96 You are correct that government intervention is not explicitly mentioned, but the passage states, "Externalities are among the main reasons governments intervene in the economic sphere." The second and third paragraph discussed about why externalities create problems, such as the difference between private and social costs with example of pollution, allows us to infer that the passage is justifying government intervention.
Hope this helps :)
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I don't get the point "How they justifies government intervention". Is this an assumption we have to consider? Cause in whole passage, the author discussed externalities, the government part I don't understand.
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Nowhere in the passage we have seen author trying to "justify" government intervention. It's too far fetched to say it's the primary purpose. One thing to note here that it is not an inference question, it's primary purpose, and I don't see author made arguments on government intervention as a primary purpose. Passage was about externalities, what they are, one example of negative externality and that's it.

A good test for primary purpose is: If I removed the sentence about government intervention, would the passage's main idea change? Here, the answer is no, which means government intervention is not the primary purpose.
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