中级微观经济学（双语）智慧树知到期末考试答案2024年

中级微观经济学（双语）智慧树知到期末考试答案2024年中级微观经济学（双语）Pierre'sfriendHenrilivesinatownwherehehastopay3francsperglassofwineand5francsperloafofbread.Henriconsumes5glassesofwineand4loavesofbreadperday.Bobhasanincomeof$15perdayandpays$.50perloafofbreadand$2perglassofwine.IfBobhasthesametastesasHenri,andiftheonlythingthateitherofthemcaresaboutisconsumptionofbreadandwine,wecandeduce:

A:thatHenriisbetteroffthanBobB:nothingaboutwhetheroneisbetteroffthantheotherC:thatbothofthemviolatetheweakaxiomofrevealedpreferencesD:thatBobisbetteroffthanHenri.答案:thatBobisbetteroffthanHenriEllsworth'sutilityfunctionisU(x,y)=min{x,y}.Ellsworthhas$150andthepriceofxandthepriceofyareboth1.Ellsworth'sbossisthinkingofsendinghimtoanothertownwherethepriceofxis1andthepriceofyis2.Thebossoffersnoraiseinpay.Ellsworth,whounderstandscompensatingandequivalentvariationperfectly,complainsbitterly.Hesaysthatalthoughhedoesn'tmindmovingforitsownsakeandthenewtownisjustaspleasantastheold,havingtomoveisasbadasacutinpayof$A.Healsosayshewouldn'tmindmovingifwhenhemovedhegotaraiseof$B.WhatareAandB?

A:A=50B=50B:A=75B=100C:A=75B=75D:A=50B=75答案:A=50B=75In1971,goodxcost5andgoodycost1.Theynowcost9and5respectively.In1971theconsumptionbundleofxandywas4x'sand5y's.Itisnow9x'sand7y's.CalculatetheLaspeyresindexofcurrentpricesrelativeto1971pricesroundedtoonedecimalplace.(RemembertheLaspeyresindexusestheoldquantitiesforweights.)

A:2.5B:2.2C:0.5D:2.4答案:2.4Donaldconsumesgoodsxandy.HisutilityfunctionisU(x,y)=xy3.Heisendowedwith43unitsofxand7unitsofy.Thepriceofxis1andthepriceofyis3.Findhisnetdemandforx.

A:18B:-30C:-20D:-27答案:-27Acompetitivefirmproducesasingleoutputusingseveralinputs.Thepriceofoutputrisesby$2perunit.Thepriceofoneoftheinputsincreasesby$5andthequantityofthisinputthatthefirmusesincreasesby6units.Thepricesofallotherinputsstayunchanged.Fromtheweakaxiomofprofitmaximizationwecantellthat:

A:theinputsofatleastoneoftheotherfactorsmusthavedecreasedbyatleast6units.B:theoutputofthegoodmusthavedecreasedbyatleast7.50units.C:theoutputofthegoodmusthaveincreasedbyatleast15units.D:theinputsoftheotherfactorsmusthavestayedconstant.答案:theoutputofthegoodmusthaveincreasedbyatleast15units.Regardlessofhisincomeandregardlessofprices,Smedleyalwaysspends25%ofhisincomeonhousing,10%onclothing,30%onfood,15%ontransportation,and20%onrecreation.Thisbehaviorisconsistentwiththefollowing:

A:Smedley'sdemandsforcommoditiesdonotchangewhentheirpriceschange.B:SmedleyhasaCobb-Douglasutilityfunction.C:Smedleyconsumesallgoodsinfixedproportions.D:Allgoodsareperfectsubstitutes.答案:SmedleyhasaCobb-DouglasutilityfunctionBobandRayarethinkingofbuyingasofa.Bob'sutilityfunctionisUB(S,MB)=(1+S)MBandRay'sutilityfunctionisUR(S,MR)=(3+S)MR;whereS=0iftheydon'tgetthesofaandS=1iftheydoandwhereMBandMRaretheamountsofmoneytheyhaverespectivelytospendontheirprivateconsumptions.Bobhasatotalof$1,200tospendonthesofaandotherstu.Rayhasatotalof$1,600tospendonthesofaandotherstu.Themaximumamountthattheycouldpayforthesofaandstillarrangetobothbebetteroffthanwithoutitis:

A:1000B:550C:533.33D:1500答案:1000Thedemandfunctionfororangejuiceisq=269-9pandthesupplyfunctionisq=9+4p;whereqisthenumberofunitssoldperyearandpisthepriceperunit,expressedindollars.Thegovernmentdecidestosupportthepriceoforangejuiceatapricefloorof$24perunitbybuyingorangejuiceanddestroyingallthatithaspurchased.Howmanyunitsmustthegovernmentdestroyperyear?

A:52B:56C:25D:61答案:52Afirmusesonlytwoinputstoproduceitsoutput.Theseinputsareperfectsubstitutes.Thisfirm:

A:couldhaveincreasingreturnstoscale,constantreturnstoscale,ordecreasingreturnstoscale.B:musthaveconstantreturnstoscale.C:musthaveincreasingreturnstoscale.D:musthavedecreasingreturnstoscale.答案:couldhaveincreasingreturnstoscale,constantreturnstoscale,ordecreasingreturnstoscale.Olliehas40dollars,whichhedecidestospendonxandy.Commodityxcosts$13perunitandcommodityycosts$11perunit.HehastheutilityfunctionU(x,y)=6x2+4y2andhecanpurchasefractionalunitsofxandy.

A:Olliewillchosesomeofeachcommodity,butmoreythanx.B:Olliewillchooseonlyy.C:Olliewillchooseonlyx.D:Olliewillchoosesomeofeachcommodity,butmorexthany.答案:OlliewillchooseonlyyForm>p2,thedemandfunctionsforgoods1and2aregivenbytheequations,x1=(m/p2)-1andx2=p1/p2;wheremisincomeandp1andp2areprices.Letthehorizontalaxisrepresentthequantityofgood1.Letp1=1andp2=2.Thenform>2;theincomeoffercurveis:

A:averticalline.B:astraightlinewithslope2.C:ahorizontalline.D:astraightlinewithaslopeof1/2.答案:ahorizontalline.Martha'sutilityfunctionisU(x,y)=min{x+2y,2x+y}.George'sutilityfunctionisU(x,y)=min{2x+4y,4x+2y}.IfGeorgeandMarthahavethesameincomeandfacethesamepricesforthegoodsxandy:

A:GeorgeandMarthawillbothdemandthesameamountofy.B:GeorgewilldemandmorexthanMarthademands.答案:GeorgeandMarthawillbothdemandthesameamountofyMatt'sutilityfunctionismin{x，4y+5z}.Thepriceofxis1,thepriceofyis4,andthepriceofzis7.Matt'sincomeis8.HowmanyunitsofxdoesMattdemand?

A:5B:7C:3.33D:4答案:4Georgerunsacookiefactory.Hiscookiesaremadewithsugar,peanutoil,andsoybeanoil.Thenumberofboxesofcookiesthatheproducesisf(su,po,so)=min{su;po+2so}wheresuisthenumberofbagsofsugar,pothenumberofcanistersofpeanutoil,andsothenumberofcanistersofsoybeanoilthatheuses.Thepriceofabagofsugaris11.Thepriceofacanisterofpeanutoilis6.Thepriceofacanisterofsoybeanoilis20.IfGeorgemakes254boxesofcookiesinthecheapestwaypossible,howmanycanistersofsoybeanoilwillheuse?

A:169.33B:0C:84.67D:127答案:127ConsiderthecaseofRonald.LetthepricesandconsumptionsinthebaseyearbeasinSituationD;wherep1=3;p2=1;x1=5;andx2=15.Ifinthecurrentyear,thepriceofgood1s1andthepriceofgood2is2,andRonald'scurrentcconsumptionsofgood1andgood2are25and25respectively,whatistheLaspeyrespriceindexofcurrentpricesrelativetobaseyearprices?(Pickthemostnearlycorrectanswer.)

A:1.17B:0.75C:0.5D:2.5答案:1.17Afirmproducespingpongballsusingtwoinputs.Wheninputpricesare(15,7)thefirmusestheinputbundle(17,71).Whentheinputpricesare(12,24)thefirmusesthebundle(77,4).Theamountofoutputisthesameinbothcases.IsthisbehaviorconsistentwithWACM?

A:NOB:ItdependsontheleveloffixedcostsC:WehavetoknowthepriceofoutputbeforewecantestWACMD:YES答案:YESLucy'sutilityfunctionis2XL+GandMelvin'sutilityfunctionisXMGwhereGistheirexpendituresonthepublicgoodstheyshareintheirapartmentandwhereXLandXMaretheirrespectiveprivateconsumptionexpenditures.Thetotalamounttheyhavetospendonprivategoodsandpublicgoodsis36,000.TheyagreeonaParetooptimalpatternofexpendituresinwhichtheamountthatisspentonLucy'sprivateconsumptionis6,000.Howmuchdotheyspentonpublicgoods?

A:10000B:20000C:5000D:8050答案:20000JustnorthofthetownofMuskrat,Ontario,inProblem35.1,isthetownofBrassMonkey,population8,000.BrassMonkey,likeMuskrat,hasasinglepublicgood,thetownskatingrinkandasingleprivategood,Labattsale.Everyone'sutilityfunctionisUi(Xi,Y)=Xi-81/Y;whereXiisthenumberofbottlesofaleconsumedbyiandYisthesizeoftheskatingrinkinsquaremeters.Thepriceofaleis$1perbottle.Thecostoftheskatingrinktothecityis$5persquaremeter.Everyonehasanincomeofatleast$5,000.WhatistheParetoefficientsizeforthetownskatingrink?

A:725squaremetersB:360squaremetersC:480squaremetersD:240squaremeters答案:360squaremetersIfthedemandfunctionforticketstoaplayisq=3600-45p;atwhatpricewilltotalrevenuebemaximized?

A:40B:160C:20D:80答案:40Thedemandforpicklesisgivenbyp=82-2qandsupplyisgivenbyp=2+2q.Whatistheequilibriumquantity?

A:20B:25C:17D:42答案:20Therelation'ispreferredto'betweencommoditybundlesisjustoneexampleofabinaryrelation.Anotherexampleistherelation'isafullbrotherof'definedoverthesetofallhumanbeings.LetxRymeanpersonxisafullbrotherofpersony.

A:TherelationRiscompletebutnottransitiveorreflexive.B:TherelationRisreflexive,transitive,andcomplete.C:TherelationRistransitiveandcompletebutnotreflexive.D:TherelationRistransitivebutnotcompleteorreflexive答案:TherelationRistransitivebutnotcompleteorreflexiveAconsumer'sbehaviorwasobservedinthreesituationswithdifferentpricesandincomes.InSituation1,shechoseabundlethatcost$1,600.InSituation2,shechoseabundlethatcost$2,500.InSituation3,shechoseabundlethatcost$3,100.ThebundlepurchasedinSituation2wouldcost$1,200atSituation1prices.ThebundlepurchasedinSituation3cost$2,000atSituation2prices.Thisconsumer'sbehaviorisknowntosatisfythestrongaxiomofrevealedpreference.Therefore:

A:thebundlepurchasedinSituation2mustcostatleast$3,100atSituation1pricB:thebundlepurchasedinSituation3mustcostatleast$3,100atSituation1priceC:thebundlepurchasedinSituation1mustcostlessthan$3,100atSituation3pricD:thebundlepurchasedinSituation1cannotcostlessthan$3,100atSituation3price答案:thebundlepurchasedinSituation1cannotcostlessthan$3,100atSituation3priceThemarginalcostcurveofafirmisMC=6y.Totalvariablecoststoproduce8unitsofoutputare:

A:256B:96C:192D:64答案:192Tonalisatravellingsubstituteorchestraconductor.Eachyear,hestartsinAnnArbor,movestoBrownsville,thentoCarsonCity,...,andsoonuntilhereachesZilvania,Ohio,afterwhichhereturnstoAnnArbor.Hegetsasalaryaccordingtothefollowingsimplerule.InBrownsvilleheispaidwhathisAnnArborconsumptionbundlewouldcostinBrownsville.InCarsonCity,heispaidwhathisBrownsvillebundlewouldcostinCarsonCity,andsoon.After26two-weekstints,hereturnstoAnnArbor,whereheispaidthecostinAnnArborofhisZilvaniabundle.Ateachstop,hespendshisentiresalaryonapples(A)andpaperbackbooks(B),soastomaximizetheutilityU=AB.Overthecourseoftheyear,hisutilitywill:

A:increaseateverystopwhererelativepricesaredifferentfromthepreviousstoB:decreaseateverystopwhererelativepricesaredifferentfromthepreviousstop.C:increaseordecreasedependingonwhetherthePaaschepriceindexgoesdownorupbetweenstopsD:beconstantateverystop.答案:increaseateverystopwhererelativepricesaredifferentfromthepreviousstoAprofit-maximizingmonopolistfacesthedemandcurve,q=100-3p.Itproducesataconstantmarginalcostof$20perunit.Aquantitytaxof$10perunitisimposedonthemonopolist'sproduct.Thepriceofthemonopolist'sproduct:

A:risesby$5.B:risesby$12.C:risesby$20.D:risesby$10.答案:risesby$5Ifthereareonlytwogoods,ifmoreofgood1isalwayspreferredtoless,andiflessofgood2isalwayspreferredtomore,then:

A:indifferencecurvesslopeupwardsB:indifferencecurvesmaycross.C:indifferencecurvesslopedownwardsD:indifferencecurvescouldtaketheformofellipses答案:indifferencecurvesslopeupwardsTheutilityfunctionU(x1,x2)=2lnx1+3lnx2representsCobb-Douglaspreferences

A:对B:错答案:对Amonopsonist'smarketpowerenableshimtohirelaboratamarginalcostthatislowerthanthewagerate.

A:正确B:错误答案:错误Ivanspendshisentireincomeontwogoods.OneofthemisaGiffengood.IfthepriceoftheGiffengoodrises,demandfortheothergoodmustfall

A:正确B:错误答案:正确Themarginalproductofafactorisjustthederivativeoftheproductionfunctionwithrespecttotheamountofthisfactor,holdingtheamountsofotherfactorinputsconstant.

A:错B:对答案:对Apureexchangeeconomyisaneconomywheregoodsaretradedbutthereisnoproduction.

A:正确B:错误答案:正确Henrietta'sutilityfunctionisU(x1,x2)=x1x2.Shehasdiminishingmarginalrateofsubstitutionbetweengoods1and2.

A:对B:错答案:对Amonopsonyoccurswhentwopreviouslycompetingfirmsreachanagreementtocolludeonprice.

A:对B:错答案:错Themarketdemandcurveissimplythehorizontalsumoftheindividualdemandcurves.

A:对B:错答案:对Ifapersonisanetsupplierofanormalgoodanditspriceincreaseswhileallotherpricesstaythesame,thenhisdemandforthegoodmustdecrease

A:对B:错答案:错Aconsumerprefersmoretolessofeverygood.Herincomerises,andthepriceofoneofthegoodsfallswhileotherpricesstayconstant.Thesechangesmusthavemadeherbetteroff.

A:错B:对答案:对TheLaspeyresindexofpricesinperiod2relativetoperiod1tellsustheratioofthecostofbuyingtheperiod1bundleatperiod2pricestothecostofbuyingtheperiod1bundleatperiod1prices.

A:对B:错答案:对Theefficientamountofairpollutionisingeneralindependentofwhetherpollutersorpolluteespaytoreducepollution.

A:对B:错答案:错Afirmfacescompetitivemarketsbothforitsinputsanditsoutputs.Ifitslongrunsupplycurveisq=3p;thenitcannothaveconstantreturnstoscale.

A:错B:对答案:对InBertrandcompetitionbetweentwofirms,eachfirmbelievesthatifitchangesitsoutput,therivalfirmwillchangeitsoutputbythesameamount.

A:对B:错答案:错Adominantstrategyequilibriumisasetofchoicessuchthateachplayer'schoicesareoptimalregardlessofwhattheotherplayerschoose.

A:错B:对答案:对Quasi-fixedcostsarethosecoststhatcanbeavoidedifandonlyifafirmproduceszerooutput.

A:错B:对答案:对Itispossibleforaconsumertosatisfytheweakaxiomofrevealedpreference,butviolatethestrongaxiomofrevealedpreference.

A:错B:对答案:对Ifleisureisaninferiorgood,thenanincreaseinthewageratewillmakeapersonworkmore.

A:对B:错答案:对Atwo-persongameinwhicheachpersonhasaccesstoonlytwopossiblestrategieswillhaveatmostoneNashequilibrium.

A:对B:错答案:错Atradebetweentwopeopleisanexampleofanexternality.

A:对B:错答案:错FieryDemonisarotgutwhiskymadeinKentucky.SmoothyisanunblendedmaltwhiskyimportedfromScotland.Edregardsthesebrandsasperfectsubstitutes.Whenhegoesintoabar,hesometimesbuysonlyFieryDemon.OthertimeshebuysonlySmoothy.ThisshowsthatEdhasunstablepreferences.

A:错B:对答案:对Inamonopolisticallycompetitiveindustrywithzeroprofits,eachfirmwillproducelessthantheamountthatminimizesaveragecosts.

A:对B:错答案:对Theweakaxiomofprofitmaximizingbehaviorstatesthatinamodernmixedeconomy,firmshaveonlyaweakincentivetomaximizeprofits.

A:对B:错答案:错Ifconsumersspendalloftheirincome,itisimpossibleforallgoodstobeinferiorgoods.

A:错误B:正确答案:正确IftheaveragecostcurveisUshaped,thenthemarginalcostcurvemustcrosstheaveragecostcurveatthebottomoftheU.

A:错B:对答案:对Partialequilibriumanalysisconcernsonlysupplyoronlydemandwhilegeneralequilibriumanalysisdealswithsupplyanddemandatthesametime.

A:错误B:正确答案:错误Therearetwogoods,bananasandpotatoes.Thepriceofbananasincreasesandthepriceofpotatoesdecreases.Ifafterthepricechangeaconsumer(whosepreferencessatisfyWARP)canstillexactlyaffordheroldconsumptionbundle,thenshewillconsumeatleastasmuchpotatoesasbefore,evenifpotatoesareaGiffengood.

A:错B:对答案:对AconsumerhastheutilityfunctionU(x,y)=x+2y1/2.Thepriceofgoodxis2andthepriceofgoodyis1.Theconsumer'sincomeis20.Ifthepriceofgoodyrisesto2,thenentirechangei