中級微觀經(jīng)濟學(xué)（雙語）智慧樹知到期末考試答案章節(jié)答案2024年山東財經(jīng)大學(xué)

中級微觀經(jīng)濟學(xué)（雙語）智慧樹知到期末考試答案+章節(jié)答案2024年山東財經(jīng)大學(xué)Ifconsumersspendalloftheirincome,itisimpossibleforallgoodstobeinferiorgoods.

答案:對Ifleisureisaninferiorgood,thenanincreaseinthewageratewillmakeapersonworkmore.

答案:對Aconsumerwhoisunabletodetectsmalldifferencesintheamountofwaterinherbeercouldhaveatransitivestrictpreferencerelationbutisunlikelytohaveatransitiveindifferencerelation.

答案:對Theeconomist'sdistinctionbetweenlongandshortruncapturestheideathatquantitiesofsomefactorinputscanbevariedintheshortrunbutnotinthelongrun.

答案:對Henrietta'sutilityfunctionisU(x1,x2)=x1x2.Shehasdiminishingmarginalrateofsubstitutionbetweengoods1and2.

答案:對LinushasutilityfunctionU(x,y)=x+2y.Ifthepriceofxis1andthepriceofyis1/2;thenLinusmustconsumeequalamountsofbothgoodsinordertomaximizehisutility.

答案:錯FieryDemonisarotgutwhiskymadeinKentucky.SmoothyisanunblendedmaltwhiskyimportedfromScotland.Edregardsthesebrandsasperfectsubstitutes.Whenhegoesintoabar,hesometimesbuysonlyFieryDemon.OthertimeshebuysonlySmoothy.ThisshowsthatEdhasunstablepreferences.

答案:對Millie'sutilityfunctionisU(x,y)=min{x，y}.Shemaximizesherutilitysubjecttoabudgetconstraint.Thepriceofxisthesameasthepriceofy.Ifthepriceofxrisesandthepriceofyandherincomeremainconstant,thenherconsumptionofywillcertainlydecrease.

答案:對Bernice'sutilityfunctionisU(x,y)=min{x,y}.Thepriceofxusedtobe3,butroseto4.Thepriceofyremainedat1.Herincomeis12.Shewouldneedanincomeof$15tobeabletoaffordabundleasgoodasheroldoneatthenewprices

答案:對Iftheproductionfunctionisf(x1,x2)=min{x1,x2};thenthecostfunctionisc(w1，w2，y)=min{w1，w2}y.

答案:錯Theshortrunindustrysupplycurvecanbefoundbyhorizontallysummingtheshortrunsupplycurvesofalltheindividualfirmsintheindustry.

答案:對SupposeaconsumerhasstrictlyconvexpreferencesandherEngelcurveforagoodisaverticallineforsomerangeofincome.Inthatsameincomerange,herdemandcurveforthegoodslopesdown.

答案:對Theonlyknownwaytoeliminateexternalitiesisthroughtaxesorsubsidies.

答案:錯IftheaveragecostcurveisUshaped,thenthemarginalcostcurvemustcrosstheaveragecostcurveatthebottomoftheU.

答案:對Ifthereareconsumptionexternalities,thenacompetitiveequilibriumisnotnecessarilyParetooptimal.

答案:對Ivanspendshisentireincomeontwogoods.OneofthemisaGiffengood.IfthepriceoftheGiffengoodrises,demandfortheothergoodmustfall

答案:對TheLaffereffectoccursonlyifthereisabackward-bendinglaborsupplycurve.

答案:錯Adiscriminatingmonopolistisabletochargedifferentpricesintwodifferentmarkets.Ifwhenthesamepriceischargedinbothmarkets,thequantitydemandedinmarket1isalwaysgreaterthanthequantitydemandedinmarket2,theninordertomaximizeprofits,themonopolistshouldchargeahigherpriceinmarket1thaninmarket2.

答案:錯priceofxwas17,thepriceofgoodywas8,andincomewas60.Onagraphwithxonthehorizontalaxisandyonthevertical,thenewbudgetlineis:

答案:steeperthantheoldoneandliesbelowit.InEastIcicle,Minnesota,onthenorthernedgeofthecornbelt,thegrowingseasonisshortandthesoilispoor.Cornyieldsaremeagerunlessagreatdealofexpensivefertilizerisused.InCorncrib,Illinoisthelandisfertileandatandthegrowingseasonis20dayslonger.Foranygivenexpenditureperacre,cornyieldsarefargreaterthaninEastIcicle.Farmersinbothplacesareprofitmaximizerswhogrowcorn.Wededucethat:

答案:marginalcostsarethesameinbothplaces.InOzone,Californiapeopleallhavethesametastesandtheyalllikehottubs.Nobodywantsmorethanonehottubbutapersonwithwealth$Mwillbewillingtopayupto:01Mforahottub.ThedistributionofwealthinOzoneisasfollows.Thenumberofpeoplewithawealthgreaterthan$WforanygivenWisapproximately1,000,000/W.ThepriceelasticityofdemandforhottubsinOzoneCaliforniais:

答案:-1Georgerunsacookiefactory.Hiscookiesaremadewithsugar,peanutoil,andsoybeanoil.Thenumberofboxesofcookiesthatheproducesisf(su,po,so)=min{su;po+2so}wheresuisthenumberofbagsofsugar,pothenumberofcanistersofpeanutoil,andsothenumberofcanistersofsoybeanoilthatheuses.Thepriceofabagofsugaris11.Thepriceofacanisterofpeanutoilis6.Thepriceofacanisterofsoybeanoilis20.IfGeorgemakes254boxesofcookiesinthecheapestwaypossible,howmanycanistersofsoybeanoilwillheuse?

答案:127Yoram'sutilityfunctionisU(x,y)=2x+5y.Thepriceofxis$4andthepriceofyis$15.Yoramhas$150aweektospendonxandy.Yoramisofferedachancetojoinaclubofy-consumers.Ifhejoins,hecangetyatapriceof$10.WhatisthemostthatYoramwouldbewillingtopaytojointheclub?

答案:nothingAcomputersoftwarefirmhasdevelopedanewandbetterspreadsheetprogram.Theprogramisprotectedbycopyrights,sothefirmcanactasamonopolistforthisproduct.Thedemandfunctionforthespreadsheetisq=50,000-100p.Anysingleconsumerwillwantonlyonecopy.Themarginalcostofproducinganddistributinganothercopyanditsdocumentationisjust$10percopy.Iftheompanysellsthissoftwareattheprofitmaximizingmonopolyprice,thenumberofconsumerswhowouldnotbuythesoftwareatthemonopolypricebutwouldbewillingtopayatleastthemarginalcostis:

答案:25000DianaconsumescommoditiesxandyandherutilityfunctionisU(x;y)=xy2.Goodxcosts$2perunitandgoodycosts$1perunit.Ifsheisendowedwith3unitsofxand6unitsofy;howmanyunitsofgoodywillsheconsume?

答案:8MaudeconsumescommoditiesxandyandherutilityfunctionisU(x,y)=xy3.Goodxcosts$3perunitandgoodycosts$1perunit.Ifsheisendowedwith6unitsofxand2unitsofy;howmanyunitsofgoodywillsheconsume?

答案:15HaroldconsumesnocommoditiesotherthanMillerLiteandBudLight.Hisannualbudgetforthesetwocommoditiesisdescribedbytheequation5x+20y=300wherexissixpacksofMillerLiteandyiscasesofBudLight.Haroldconsiders2casesofBudLighttobeperfectsubstitutesfor10sixpacksofMillerLite.Whichofthefollowingistrue?

答案:Hewillconsume60sixpacksofMillerLiteperyear.Thedemandfunctionfororangejuiceisq=269-9pandthesupplyfunctionisq=9+4p;whereqisthenumberofunitssoldperyearandpisthepriceperunit,expressedindollars.Thegovernmentdecidestosupportthepriceoforangejuiceatapricefloorof$24perunitbybuyingorangejuiceanddestroyingallthatithaspurchased.Howmanyunitsmustthegovernmentdestroyperyear?

答案:52Quincylivesondingdongsandseafoodsalads.Thepriceofdingdongsis1dollarperbagandthepriceofseafoodsaladsis4dollarseach.Quincyallowshimselftospendnomorethan23dollarsadayonfood.Healsorestrictshisconsumptionto3,300caloriesperday.Thereare600caloriesinabagofdingdongsand300caloriesinaseafoodsalad.Ifhespendshisentiremoneybudgeteachdayandconsumesnomorecaloriesthanhiscalorielimit:

答案:hecanconsumeupto3bagsofdingdongsperday,butnomore.MaryGranolaconsumestomatoesandnectarines.Mary'sindifferencecurvesarekinky.Whensheisconsumingmoretomatoesthannectarines,sheisjustwillingtotrade3tomatoesfor1nectarines.Whensheisconsumingmorenectarinesthantomatoes,sheisjustwillingtotrade4

nectarinesfor1tomatoes.LetP1bethepriceofnectarinesandP2thepriceoftomatoes.Marymaximizesherutilitysubjecttoherbudgetconstraint.Whichistrue?(Hint:Sketchoneofherindifferencecurves.)

答案:WhenP1>3P2,shemustconsumeonlytomatoes.Ernest'sincomeelasticityofdemandfornaturalgasis0.4.Hispriceelasticityofdemandfornaturalgasis-0.3;andhespends10%ofhisincomeonnaturalgas.Whatishissubstitutionpriceelasticity?

答案:-0.26Waltconsumesstrawberriesandcreambutonlyinthefixedratioofthreeboxesofstrawberriestotwocartonsofcream.Atanyotherratio,theexcessgoodsaretotallyuselesstohim.Thecostofaboxofstrawberriesis10andthecostofacartonofcreamis10.Walt'sincomeis200.Whichofthefollowingistrue?

答案:Waltdemands12boxesofstrawberries.Apeckis1/4ofabushel.Ifthepriceelasticityofdemandformilletis-0:6whenmilletismeasuredinbushels,thenwhenmilletismeasuredinpecks,thepriceelasticityofdemandformilletwillbe:

答案:Noneofall.Producer'ssurplusatpricepistheverticaldistancebetweenthesupplycurveandthedemandcurveatpricep

答案:錯Jackhasabackward-bendinglaborsupplycurve.Atwagesof$5anhourhechoosestowork50hoursaweek.Hisbosswantshimtoworkmorehoursperweekandoffershim$5anhourforthefirst50hoursperweekand$7anhourforeveryhourbeyond50hoursperweek.Becauseofhisbackwardbendingsupplycurve,Jackmightactuallychoosetoworkfewerhours.

答案:錯Ifpreferencesareconvex,thenforanycommoditybundlex;thesetofcommoditybundlesthatareworsethanxisaconvexset.

答案:錯Inordertomaximizehisprofits,amonopolistwhopracticesthirddegreepricediscriminationwithtwoormoremarketsshouldchargehigherpricesinmarketswithmoreinelasticdemandfunctions.

答案:對Itispossibleforaconsumertosatisfytheweakaxiomofrevealedpreference,butviolatethestrongaxiomofrevealedpreference.

答案:對Ifapersonhasnonon-laborincome,adecreaseinwagescausesthebudgetlinebetweenleisureandothergoodstoshiftdownwardinaparallelfashion

答案:錯Ifaconsumerisinitiallyendowedwithapositiveamountoftwogoodsandsellssomeofonetogetmoreoftheother,andifshehasnoothersourcesofincome,thenherbudgetlinewillpassthroughherendowmentpoint.

答案:對Ifagoodisaninferiorgood,thenanincreaseinitspricewillincreasethedemandforit

答案:錯Amonopolistwhofacesahorizontallaborsupplycurvewilldemandlesslaborthanhewouldifheactedcompetitively.

答案:對Theamountofagoodsuppliedisindependentoftheprice.Ifasalestaxisimposedonthegood,thenthepricepaidbyconsumerswillnotchangeatall.

答案:對Otherthingsbeingequal,alumpsumtaxisatleastasgoodforaconsumerasasalestaxthatcollectsthesamerevenuefromhim.

答案:對Arationalconsumerprefersmoreofgoodxtoless.Ifthepriceofgoodxrisesandthepricesofallothergoodsremainconstant,thentheconsumermustnecessarilydemandlessofx

答案:錯Supplyanddemandtheoryshowsusthattheburdenofasalestaxissharedequallybysuppliersanddemanderswhetherthetaxiscollectedfromthesellersorcollectedfromthebuyers.

答案:錯Ifthepriceoftheoutputofaprofit-maximizing,competitivefirmrisesandallotherpricesstayconstant,thenthefirm'soutputcannotfall.

答案:對Thirddegreepricediscriminationoccurswhenamonopolistsellsoutputtodifferentpeopleatdifferentprices,buteveryunitthatanindividualbuyscoststhesameamount.

答案:對Theconditionalfactordemandfunctionforfactor1isafunctionx1(w1，w2，y)thattellstheratioofpricetooutputforanoptimalfactorchoiceofthefirm.

答案:錯Ingeneralequilibriumanalysis,anallocationisafeasibleallocationifeveryconsumerisconsumingabundlethatcostsnomorethanhisorherincome.

答案:錯AStackelbergleaderchooseshisactionsontheassumptionthathisrivalwilladjusttotheleader'sactionsinsuchawayastomaximizetherival'sprofits.

答案:對Afirmfacescompetitivemarketsbothforitsinputsanditsoutputs.Ifitslongrunsupplycurveisq=3p;thenitcannothaveconstantreturnstoscale.

答案:對InNashequilibrium,eachplayerismakinganoptimalchoiceforherself,giventhechoicesoftheotherplayers.

答案:對MaryGranola'sutilityfunctionisU(x，y)=min{x+2y，y+2x}.Marymaximizesherutilitysubjecttoabudgetconstraint.Ifshechoosesthebundle(5，6);thenitmustbethatthepriceofxisexactlytwicethepriceofy.

答案:對Inamonopolisticallycompetitiveindustrywithzeroprofits,eachfirmwillproducelessthantheamountthatminimizesaveragecosts.

答案:對Ifapersonisanetsellerofsomegoodandthepriceofthatgooddecreases,shemightpossiblybecomeanetbuyer.

答案:對JustnorthofthetownofMuskrat,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?

答案:360squaremetersTheinversedemandfunctionformangosisdefinedbytheequation,p=91-5q;whereqisthenumberofcratesthataresold.Theinversesupplyfunctionisdefinedbyp=3+6q.Inthepasttherewasnotaxonmangosbutnowataxof$44percratehasbeenimposed.Whatarethequantitiesproducedbeforeandafterthetaxwasimposed?

答案:8cratesbeforeand4cratesafterPrudenceiscarefultoplanahead.SheisgoingtoParisnextyeartostudy.Toprotectherselffromexchangerateuctuations,sheboughtafuturescontractforthenumberoffrancssheplanstospendnextyear,givencurrentprices.WhenshearrivesinParis,shecancashinhercontractforthismanyfrancsnomatterwhattheexchangerateis.IfthevalueofthefrancrelativetothedollarshouldhappentofallbeforeshegetstoParis:

答案:shewillbeatleastaswelloffanprobablybetteroffthaniftheexchangeratehadn'tchanged.Tonalisatravellingsubstituteorchestraconductor.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:

答案:increaseateverystopwhererelativepricesaredifferentfromthepreviousstoOnasmallisland,papayascanonlybesoldinthemarketinthecenteroftheisland.Althoughpapayasonlycost1toraise,theycanbesoldinthemarketfor3.Butitcosts.1perkilometertotransporteachpapayatomarket.Ifanacreoflandgrows200papayas,howmuch

rentdoesanacreofland4kilometersfromthemarketcommand?

答案:320Therelation'ispreferredto'betweencommoditybundlesisjustoneexampleofabinaryrelation.Anotherexampleistherelation'isafullbrotherof'definedoverthesetofallhumanbeings.LetxRymeanpersonxisafullbrotherofpersony.

答案:TherelationRistransitivebutnotcompleteorreflexiveElla'sutilityfunctionismin{2x,y}.Ifthepriceofxis15andthepriceofyis10,howmuchmoneywouldsheneedtobeabletopurchaseabundlethatshelikesaswellasthebundle(x,y)=(10,8)?

答案:140RememberKingKanutaandhistropicalisland?ThedemandfunctionforcoconutsbyhissubjectsontheislandisD(p)=1200-100pandthesupplyfunctionisS(p)=100p.Thelawusedtobethatanysubjectwhoconsumedacoconuthadtopayanothercoconuttotheking.KingKanutathenateallthecoconutshegot.Butnowtheking,apparentlyfedupwithcoconuts,decidestosellthecoconutsthathecollectsinthelocalmarketatthegoingsellingprice,ps.Inequilibrium,thenumberofcoconutsthatwillnowbeproducedis:

答案:400Matt'sutilityfunctionismin{x，4y+5z}.Thepriceofxis1,thepriceofyis4,andthepriceofzis7.Matt'sincomeis8.HowmanyunitsofxdoesMattdemand?

答案:4Twentyyearsago,Dmitriconsumedbreadwhichcosthim10kopeksaloafandpotatoeswhichcosthim14kopeksasack.Withhisincomeof208,hebought11loavesofbreadand7sacksofpotatoes.Todayhehasanincomeof393.Breadnowcostshim21kopeksaloafandpotatoescosthim16kopeksasack.Assuminghispreferenceshaven'tchanged(andthesizesofloavesandsackshaven'tchanged),whenwashebetteroff?

答案:TodayIfoutputisproducedwithtwofactorsofproductionandwithincreasingreturnstoscale:

答案:onagraphofproductionisoquants,movingalongarayfromtheorigin,outputmorethandoublesasthedistancefromtheorigindoublesDonaldconsumesgoodsxandy.HisutilityfunctionisU(x,y)=xy3.Heisendowedwith43unitsofxand7unitsofy.Thepriceofxis1andthepriceofyis3.Findhisnetdemandforx.

答案:-27Teresaspendsherentirebudgetandconsumes6unitsofxand20unitsofy.Thepriceofxistwicethepriceofy.Herincomedoublesandthepriceofydoubles,butthepriceofxstaysthesame.Ifshecontinuestobuy20unitsofy;whatisthelargestnumberofunitsofxthatshecanafford?

答案:12Acompetitivefirmproducesasingleoutputusingseveralinputs.Thepriceofoutputrisesby$3perunit.Thepriceofoneoftheinputsincreasesby$3andthequantityofthisinputthatthefirmusesincreasesby6units.Thepricesofallotherinputsstayunchanged.Fromtheweakaxiomofprofitmaximizationwecantellthat:

答案:theoutputofthegoodmusthaveincreasedbyatleast6units.Wilburconsumesonlyapplesandbananas.Heprefersmoreapplestoless,buthegetstiredofbananas.Ifheconsumesfewerthan18bananasperweek,hethinksthatonebananaisaperfectsubstituteforoneapple.Butyouwouldhavetopayhimoneappleforeachbananabeyond18thatheconsumes.Theindifferencecurvethatpassesthroughtheconsumptionbundlewith27applesand30bananasalsopassesthroughthebundlewithAapplesand13bananas,whereAequals:

答案:20Olliehas40dollars,whichhedecidestospendonxandy.Commodityxcosts$13perunitandcommodityycosts$11perunit.HehastheutilityfunctionU(x,y)=6x2+4y2andhecanpurchasefractionalunitsofxandy.

答案:Olliewillchooseonlyy.Thedemandforpicklesisgivenbyp=82-2qandsupplyisgivenbyp=2+2q.Whatistheequilibriumquantity?

答案:20MargeCostaproducesplasticdogdishesusingaprocessthatrequiresonlylaborandplasticasinputsandhasconstantreturnstoscale.Withtheprocesssheiscurrentlyusing,alaborercanturnout30dogdishesanhour.Thewagerateis$9perhour.TheplasticinadogdishcostsMarge$0.1.Shehasnoothercostsbesideslaborandplastic.Margefacesaperfectlycompetitivemarketforplasticdogdishes,andshedecidesthatsheismaximizingprofitswhenshemakes300dogdishesanhour.Whatisthemarketpriceofdogdishes?

答案:0.42Lindaspendsherentirebudgetandconsumes15unitsofxand19unitsofy.Thepriceofxistwicethepriceofy.Herincomedoublesandthepriceofydoubles,butthepriceofxstaysthesame.Ifshecontinuestobuy19unitsofy;whatisthelargestnumberofunitsofxthatshecanafford?

答案:30Thefollowingrelationshipmustholdbetweentheaveragetotalcost(ATC)curveandthemarginalcostcurve(MC):

答案:ifATCisrising,MCmustbegreaterthanATC.Whenthepriceswere(5,1);Vanessachosethebundle(x,y)=(6,3).Nowatthenewprices,(px,py);shechoosesthebundle(x,y)=(5,7).ForVanessa'sbehaviortobeconsistentwiththeweakaxiomofrevealedpreference,itmustbethat:

答案:4py<pxAmonopolistfacestheinversedemandcurvep=192-4q.,Atwhatlevelofoutputishistotalrevenuemaximized?

答案:24Ifthereareconstantreturnstoscaleinacompetitiveindustry,thenthelongrunindustrysupplycurveforthatindustryishorizontal.

答案:對Theproductionsetofafirmisthesetofallproductsthefirmcanproduce.

答案:錯BillKatzprefersmoreofgood1tolessandhepreferslessofgood2tomore.Billhasconvexpreferences.Ifwedrawhisindifferencecurveswithgood1onthehorizontalaxisandgood2ontheverticalaxis,thenhisindifferencecurveshavepositiveslopebutgetsteeperastheyrise.

答案:錯Apureexchangeeconomyisaneconomywheregoodsaretradedbutthereisnoproduction.

答案:對Iftwogoodsxandyareperfectcomplements,thenifthepriceofxfalls,theentirechangeinthedemandforxisduetotheincomeeffect.

答案:對Billreceiveshalfofhisincomeinwagesandhalfofhisincomeindividends.Billwouldbeindifferentbetweena50percentincreaseinhiswagerateanda50percentincreaseinhisdividendincome

答案:錯Iftheelasticityofdemandcurveformilletis-0.5atallpriceshigherthanthecurrentprice,wewouldexpectthatwhenbadweatherreducesthesizeofthemilletcrop,totalrevenueofmilletproducerswillfall

答案:錯Aperson'sfullincomeistheamountofincomethatheorshewouldhaveiftherewerenotaxes

答案:錯Atwo-persongameinwhicheachpersonhasaccesstoonlytwopossiblestrategieswillhaveatmostoneNashequilibrium.

答案:錯Therearetwogoods.Youknowhowmuchofgood1aconsumercanaffordifshespendsallofherincomeongood1.Ifyouknowtheratioofthepricesofthetwogoods,thenyoucoulddrawtheconsumer'sbudgetlinewithoutanymoreinformation.

答案:對Itispossibletohaveanindustryinwhichallfirmsmakezeroeconomicprofitsinlongrunequilibrium.

答案:對Adominantstrategyequilibriumisasetofchoicessuchthateachplayer'schoicesareoptimalregardlessofwhattheotherplayerschoose.

答案:對Ifthereareincreasingreturnstoscale,thenaveragecostsareadecreasingfunctionofoutput

答案:對Conjecturalvariationreferstothefactthatinasinglemarketthereisvariationamongfirmsintheirestimatesofthedemandfunctioninfutureperiods.

答案:錯Ifpreferencesarehomothetic,thentheslopeoftheEngelcurveforanygoodwilldecreaseasincomeincreases.

答案:錯ThecostfunctionC(y)=10+3yhasmarginalcostlessthanaveragecostforalllevelsofoutput.

答案:對Atradebetweentwopeopleisanexampleofanexternality.

答案:錯Ifthedemandcurveisalinearfunctionofprice,thenthepriceelasticityofdemandisthesameatallprices.

答案:錯Priceequalsmarginalcostisasuffcientconditionforprofitmaximization.

答案:錯Iftheequationforthedemandcurveisq=50-1p;thentheratioofmarginalrevenuetopriceisconstantaspricechanges.

答案:錯ApersonwiththeutilityfunctionU(x1,x2)=min{x1+2x2,2x1+x2}hasconvex,butnotstrictlyconvexpreferences.

答案:對Ifthereareincreasingreturnstoscale,thencostsperunitofoutputdecreaseasyoumovedownwardandtotherightalonganisocostline.

答案:錯Ineconomictheory,thedemandforagoodmustdependonlyonincomeanditsownpriceandnotonthepricesofothergoods.

答案:錯Inacompetitivemarket,ifbothdemandandsupplycurvesarelinear,thenaperunittaxof$10willgenerateexactlythesamedeadweightlossasaperunitsubsidyof$10.

答案:對Ingeneral,aggregatedemanddependsonlyonpricesandtotalincomeandnotonincomedistribution

答案:錯IfthereisapriceincreaseforagoodthatJosephineconsumes,hercompensatingvariationisthechangeinherincomethatallowshertopurchasehernewoptimalbundleattheoriginalprices.

答案:錯Iftheequationforthedemandcurveisq=40-2p;thentheratioofmarginalrevenuetopriceisconstantaspricechanges.

答案:錯Whilegametheorypredictsnoncooperativebehaviorforasingleplayofprisoners'dilemma,itwouldpredictcooperativetit-for-tatbehaviorifthesamepeopleplayprisoners'dilemmatogetherfor,say,20rounds.

答案:錯TheSlutskysubstitutioneffectmeasuresthemovementbetweentwopointsonthesameindifferencecurve.

答案:錯Thestrongaxiomofrevealedpreferencesaysthatifaconsumerboughtxwhenhecouldhaveaordedyandywhenhecouldhaveaordedz;thenhewillbuyxwheneverhecanaffordz.

答案:錯Afixedfactorisafactorofproductionthatisusedinfixedproportiontothelevelofoutput.

答案:錯IfsomeonehasaCobb-Douglasutilityfunctionandnoincomefromanysourceotherthanlaborearnings,thenanincreaseinwageswillnotchangetheamountthatpersonchoosestowork

答案:對Themarketdemandcurveissimplythehorizontalsumoftheindividualdemandcurves.

答案:對Ifheproducesanythingatall,aprofit-maximizingmonopolistwithsomefixedcostsandnovariablecostswillsetpriceandoutputsoastomaximizerevenue.

答案:對Jimmy'sutilityfunctionisU(a,b)=abwhereaishisconsumptionofapplesandbishisconsumptionofbananas.IfpricesandincomechangeinsuchawaythatJimmy'soldconsumptionliesonhisnewbudgetline,thenJimmywillnotchangehisconsumptionbundle.

答案:錯Ifthedemandcurveisadownward-slopingstraightline,thenthepriceelasticityofdemandisconstantallalongthedemandcurve.

答案:錯InCournotequilibriumeachfirmchoosesthequantitythatmaximizesitsownprofitsassumingthatthefirm'srivalwillcontinuetosellatthesamepriceasbefore.

答案:錯Supposethatthedemandcurveforanindustry'soutputisadownwardslopingstraightlineandthereisconstantmarginalcost.ThenthelargerthenumberofidenticalfirmsproducinginCournotequilibrium,thelowerwillbetheprice.

答案:對Thepossibilityofmorefirmsenteringanindustryinthelongruntendstomakelongrunindustrysupplymorepriceelasticthanshortrunindustrysupply.

答案:對AconsumerhastheutilityfunctionU(x,y)=x+2y1/2.Thepriceofgoodxis2andthepriceofgoodyis1.Theconsumer'sincomeis20.Ifthepriceofgoodyrisesto2,thenentirechangeindemandforyisduetothesubstitutioneffect.

答案:對Hollyconsumesxandy.Thepriceofxis4andthepriceofyis4.Holly'sonlysourceofincomeisherendowmentof6unitsofxand6unitsofywhichshecanbuyorsellatthegoingprices.Sheplanstoconsume7unitsofxand5unitsofy.Ifthepriceschangeto7forxand7fory;whichofthefollowingistrue?

答案:SheisneitherbetteroffnorworseoffPierre'sfriendHenrilivesinatownwherehehastopay3francsperglassofwineand5francsperloafofbread.Henriconsumes5glassesofwineand4loavesofbread