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ID：37253155
大小：487.10 KB
页数：93页
时间：2019-05-11
《北大微观经济学课件ch16Equilibrium》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、ChapterSixteenEquilibrium均衡StructureMarketequilibriumQuantitytaxandequilibriumTaxincidence（税收分担）Deadweightloss（额外净损失）MarketEquilibriumAmarketisinequilibriumwhentotalquantitydemandedbybuyersequalstotalquantitysuppliedbysellers.Alsocalled“marketiscleared”SupplymaynotequalproductionMarketEquil
2、ibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)MarketSettingCompetitivemarketContestablemarketMarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*q*D(p*)=S(p*);themarket isinequilibrium.MarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*S(p’)D(p’)3、;anexcess ofquantitysuppliedover quantitydemanded.p’D(p’)MarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*S(p’)D(p’)4、p*D(p”)D(p”)>S(p”);anexcess ofquantitydemanded overquantitysupplied.p”S(p”)MarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*D(p”)D(p”)>S(p”);anexcess ofquantitydemanded overquantitysupplied.p”S(p”)Marketpricemustrisetowardsp*.MarketEquilibrium–LinearD&SAttheequilibriumpric5、ep*,D(p*)=S(p*). Thatis,whichgivesandMarketEquilibriumpD(p),S(p)D(p)=a-bpMarket demandMarket supplyS(p)=c+dpMarketEquilibriumCanwecalculatethemarketequilibriumusingtheinversemarketdemandandsupplycurves?Yes,itisthesamecalculation.MarketEquilibriumtheequationoftheinversemarket demandcurve.And6、theequationoftheinversemarket supplycurve.MarketEquilibriumqD-1(q), S-1(q)D-1(q)=(a-q)/bMarketinverse demandS-1(q)=(-c+q)/dp*q*Atequilibrium, D-1(q*)=S-1(q*).MarketinversesupplyMarketEquilibriumandAttheequilibriumquantityq*,D-1(p*)=S-1(p*). Thatis,whichgivesandMarketEquilibriumqD-1(q), S-1(7、q)D-1(q)=(a-q)/bMarket demandMarket supplyS-1(q)=(-c+q)/dMarketEquilibriumTwospecialcases:quantitysuppliedisfixed,independentofthemarketprice,andquantitysuppliedisextremelysensitivetothemarketprice.MarketEquilibriumS(p)=c+dp,sod=0andS(p)ºc.pqq*=cMarketqu
3、;anexcess ofquantitysuppliedover quantitydemanded.p’D(p’)MarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*S(p’)D(p’)4、p*D(p”)D(p”)>S(p”);anexcess ofquantitydemanded overquantitysupplied.p”S(p”)MarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*D(p”)D(p”)>S(p”);anexcess ofquantitydemanded overquantitysupplied.p”S(p”)Marketpricemustrisetowardsp*.MarketEquilibrium–LinearD&SAttheequilibriumpric5、ep*,D(p*)=S(p*). Thatis,whichgivesandMarketEquilibriumpD(p),S(p)D(p)=a-bpMarket demandMarket supplyS(p)=c+dpMarketEquilibriumCanwecalculatethemarketequilibriumusingtheinversemarketdemandandsupplycurves?Yes,itisthesamecalculation.MarketEquilibriumtheequationoftheinversemarket demandcurve.And6、theequationoftheinversemarket supplycurve.MarketEquilibriumqD-1(q), S-1(q)D-1(q)=(a-q)/bMarketinverse demandS-1(q)=(-c+q)/dp*q*Atequilibrium, D-1(q*)=S-1(q*).MarketinversesupplyMarketEquilibriumandAttheequilibriumquantityq*,D-1(p*)=S-1(p*). Thatis,whichgivesandMarketEquilibriumqD-1(q), S-1(7、q)D-1(q)=(a-q)/bMarket demandMarket supplyS-1(q)=(-c+q)/dMarketEquilibriumTwospecialcases:quantitysuppliedisfixed,independentofthemarketprice,andquantitysuppliedisextremelysensitivetothemarketprice.MarketEquilibriumS(p)=c+dp,sod=0andS(p)ºc.pqq*=cMarketqu
4、p*D(p”)D(p”)>S(p”);anexcess ofquantitydemanded overquantitysupplied.p”S(p”)MarketEquilibriumpD(p),S(p)q=D(p)Market demandMarket supplyq=S(p)p*D(p”)D(p”)>S(p”);anexcess ofquantitydemanded overquantitysupplied.p”S(p”)Marketpricemustrisetowardsp*.MarketEquilibrium–LinearD&SAttheequilibriumpric
5、ep*,D(p*)=S(p*). Thatis,whichgivesandMarketEquilibriumpD(p),S(p)D(p)=a-bpMarket demandMarket supplyS(p)=c+dpMarketEquilibriumCanwecalculatethemarketequilibriumusingtheinversemarketdemandandsupplycurves?Yes,itisthesamecalculation.MarketEquilibriumtheequationoftheinversemarket demandcurve.And
6、theequationoftheinversemarket supplycurve.MarketEquilibriumqD-1(q), S-1(q)D-1(q)=(a-q)/bMarketinverse demandS-1(q)=(-c+q)/dp*q*Atequilibrium, D-1(q*)=S-1(q*).MarketinversesupplyMarketEquilibriumandAttheequilibriumquantityq*,D-1(p*)=S-1(p*). Thatis,whichgivesandMarketEquilibriumqD-1(q), S-1(
7、q)D-1(q)=(a-q)/bMarket demandMarket supplyS-1(q)=(-c+q)/dMarketEquilibriumTwospecialcases:quantitysuppliedisfixed,independentofthemarketprice,andquantitysuppliedisextremelysensitivetothemarketprice.MarketEquilibriumS(p)=c+dp,sod=0andS(p)ºc.pqq*=cMarketqu
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