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为什么征税产生无谓损失？损失大小由什么决定？Why does a tax create a deadweight loss？ W hat determines the size of this loss？
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(1)如果P=60美元/桶，天然气的自由市场价格是多少？如果价格上限为3美元/千立方英尺，无谓损失多大？
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In Example 9. 1 (page 290), we calculated the gains and losses from price controls on natural gas and found that there was a deadweight loss of $ 5.68 billion. This calculation was based on a price of oil of $50 per barrel.
a. If the price of oil were $ 60 per barrel，what would be the free - market price of gas？ How large a deadweight loss would result if the maximum allowable price of natural gas were $3. 00 per thousand cubic feet？
b. What price of oil would yield a free - market price of natural gas of $3. 00？
