问题已解决
假設(shè)市場(chǎng)中有大量企業(yè),每家企業(yè)的長(zhǎng)期生產(chǎn)函數(shù)都相同,LC=Q3-4Q2+8Q (1)?試求該市場(chǎng)達(dá)到長(zhǎng)期均衡的價(jià)格; (2)?如果市場(chǎng)需求函數(shù)為Q=2000-100P,在市場(chǎng)達(dá)到長(zhǎng)期均衡時(shí),市場(chǎng)交易量為多少?市場(chǎng)中容納了多少家企業(yè)?
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您的問(wèn)題老師解答(計(jì)算)中,請(qǐng)耐心等待
2020 05/21 12:39
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Lyle 
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2020 05/21 12:45
你好!
大量企業(yè)是完全競(jìng)爭(zhēng)市場(chǎng)
(1)長(zhǎng)期均衡條件為MR=LMC=SMC=LAC=SAC
LMC=3Q^2-8Q+8 LAC=Q^2-4Q+8
得Q=2 P=MR=LMC=4
(2)將第一問(wèn)得到的P帶入市場(chǎng)需求函數(shù)
市場(chǎng)Q=1600 所以市場(chǎng)交易量1600
而第一問(wèn)單個(gè)企業(yè)的Q=2
所以總企業(yè)數(shù)=800
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2020 05/21 13:02
P為什么等于4啊老師
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Lyle 
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2020 05/21 13:27
因?yàn)橥耆?jìng)爭(zhēng)市場(chǎng)P=MR
而長(zhǎng)期均衡下MR=LMC
求出Q后代入LMC就可以了
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