复旦大学-微观经济学 第14章 要素投入品市场.ppt

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1、Chapter14MarketsforFactorInputs1Chapter14TopicstobeDiscussedCompetitiveFactorMarketsEquilibriuminaCompetitiveFactorMarketFactorMarketswithMonopsonyPowerFactorMarketswithMonopolyPower2Chapter14CompetitiveFactorMarketsCharacteristics1)Largenumberofsellersofthefactorofproduction2)Largenumberofbu

2、yersofthefactorofproduction3)Thebuyersandsellersofthefactorofproductionarepricetakers3Chapter14CompetitiveFactorMarketsDemandforaFactorInputWhenOnlyOneInputIsVariableDemandforfactorinputsisaderiveddemand…derivedfromfactorcostandoutputdemand4Chapter14CompetitiveFactorMarketsAssumeTwoinputs:Cap

3、ital(K)andLabor(L)CostofKisrandthecostoflaboriswKisfixedandLisvariableDemandforaFactorInputWhenOnlyOneInputIsVariable5Chapter14CompetitiveFactorMarketsProblemHowmuchlabortohireDemandforaFactorInputWhenOnlyOneInputIsVariable6Chapter14CompetitiveFactorMarketsMeasuringtheValueofaWorker’sOutputMa

4、rginalRevenueProductofLabor(MRPL)MRPL=(MPL)(MR)DemandforaFactorInputWhenOnlyOneInputIsVariable7Chapter14CompetitiveFactorMarketsAssumeperfectcompetitionintheproductmarketThenMR=PDemandforaFactorInputWhenOnlyOneInputIsVariable8Chapter14CompetitiveFactorMarketsQuestionWhatwillhappentothevalueof

5、MRPLwhenmoreworkersarehired?DemandforaFactorInputWhenOnlyOneInputIsVariable9Chapter14MarginalRevenueProductHoursofWorkWages($perhour)MRPL=MPLxPCompetitiveOutputMarket(P=MR)MRPL=MPLxMRMonopolisticOutputMarket(P

6、PL>w(themarginalcostofhiringaworker):hiretheworkerIfMRPL

7、LaborMarket(withCapitalFixed)QuantityofLaborPriceofLaborWhynothirefewerormoreworkersthanL*.MRPL=DLL*TheprofitmaximizingfirmwillhireL*unitsoflaboratthepointwherethemarginalrevenueproductoflaborisequaltothewagerate.12Chapter14CompetitiveFactor