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| | '''1. In your own words, try to give a better definition of "externalities" than provided by this Lecture.''' | | '''1. In your own words, try to give a better definition of "externalities" than provided by this Lecture.''' |
| | The positive or negative effect of a transaction on persons other than the buyer and seller. | | The positive or negative effect of a transaction on persons other than the buyer and seller. |
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| | + | :Superb. |
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| | '''2. Explain why marginal revenue must be zero when total revenue is maximized.''' | | '''2. Explain why marginal revenue must be zero when total revenue is maximized.''' |
| | If the total revenue is maximized you can't make any more revenue. | | If the total revenue is maximized you can't make any more revenue. |
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| | + | :Right, but relate this to marginal revenue. (Minus 1). |
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| | '''4. Give an example of a positive externality, and an example of a negative externality. The example does not have to be limited to a business.''' | | '''4. Give an example of a positive externality, and an example of a negative externality. The example does not have to be limited to a business.''' |
| | An example of a transaction that can either positive or negative externalities is smoking. If a person buys cigarettes and smokes them in a public place a non-smoking person may experience a negative externality in having to breathe the polluted air. On the other hand if a poor person who can't afford cigarettes parks himself next to the smoker, he reaps the benefit of a free smoke. | | An example of a transaction that can either positive or negative externalities is smoking. If a person buys cigarettes and smokes them in a public place a non-smoking person may experience a negative externality in having to breathe the polluted air. On the other hand if a poor person who can't afford cigarettes parks himself next to the smoker, he reaps the benefit of a free smoke. |
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| | + | :Note that the poor person is hurting himself by doing that. But your answer is clever and receives full credit. |
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| | '''5. Explain why private firms in the free market are unlikely to try to provide public goods.''' | | '''5. Explain why private firms in the free market are unlikely to try to provide public goods.''' |
| | Because they are not getting any benefit, since it's a public good. A firm is not going to do something if it can't get any profit. | | Because they are not getting any benefit, since it's a public good. A firm is not going to do something if it can't get any profit. |
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| | + | :OK, could explain a bit more why. |
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| | '''6. Review question: the cross-elasticity of A with respect to B is positive, and C with respect to D is negative. What is the relationship (complement or substitute?) of goods A and B with each other, and C and D with each other? Explain.''' | | '''6. Review question: the cross-elasticity of A with respect to B is positive, and C with respect to D is negative. What is the relationship (complement or substitute?) of goods A and B with each other, and C and D with each other? Explain.''' |
| | A and B are complements because they are positive. C and D are substitutes because they are negative. | | A and B are complements because they are positive. C and D are substitutes because they are negative. |
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| | + | :Nope. You have this backwards. (Minus 1). |
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| | '''7. List the four factors of production and give a very brief explanation of each.''' | | '''7. List the four factors of production and give a very brief explanation of each.''' |
| | Land, money, workers and entrepreneurship. | | Land, money, workers and entrepreneurship. |
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| | + | :Good, but need to include "a very brief explanation of each" as requested. (Minus 1) |
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| | + | :Good work. 57/60.--[[User:Aschlafly|Andy Schlafly]] 23:07, 25 November 2009 (EST) |
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| | + | [[Category:Economics Homework Ten Answers]] |