微观经济学第一次在线作业Microeconomics for the first time online homework.docx
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微观经济学第一次在线作业Microeconomicsforthefirsttimeonlinehomework
微观经济学第一次在线作业（Microeconomicsforthefirsttimeonlinehomework）
Whichofthefollowingfirstquestionsisnottrueaboutmicroeconomicsandmacroeconomics?
Youranswer:
A
Subjectscore:
0.5
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0.5
Annotation:
Aiswrong,macroeconomicsregardseconomicwholeastheobjectofstudy,donottakelarge-scaleindustryastheresearchobject
Whichofthefollowingsecondquestionsismostlikelytobestudiedbymicroeconomists?
Youranswer:
C
Subjectscore:
0.5
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0.5
Annotation:
theemploymentprobleminanindustryismicro,andtheotherthreearemacroeconomicissues.
Thethirdpointonthefrontierofproductionpossibilitiesis...
Youranswer:
A
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0.5
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0.5
Note:
thepointontheboundaryoftheproductionpossibilityisefficient,andthepointinitindicatesinefficiency.
Fourth,ifalineardemandcurveistangenttoacurvetypedemandcurve,thenthedemandpriceelasticityofthetwocurveatthepointoftangency（...）
Youranswer:
A
Subjectscore:
0.5
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0.5
Note:
thepriceelasticityofdemandforagivenpointdependsonitscoordinatesandslope,whetherinstraightlineorcurve,thetwofactorsarethesame.
Fifth,ifthedemandcurveisastraightlinedownwardtotheright,theseller'stotalincomewhenthepricedropsfromhightolow
Youranswer:
B
Subjectscore:
0.5
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0.5
Note:
becausethepriceelasticityofdemandonthedemandcurveisdifferent,thetopleftpointiselastic,soreducethepricewhenthetotalincomeincreased,rightbelowthepointoflackofflexibility,soreducethepricetoreducetotalrevenue.
Sixth,ifthepriceofoneofthetwogoodschangeswhenthepriceofoneofthesetwogoodsincreasesordecreasesatthesametime,thepriceelasticitycoefficientofthecrossdemandis
Youranswer:
A
Subjectscore:
0.5
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0.5
Annotation:
ifthepriceofacommoditychangesandthedemandfortwokindsofgoodschangesatthesametime,thetwogoodsarecomplementarygoods,andthecrosselasticityofthecomplementarygoodsisnegative.
Seventh,themarketsupplycurveofacommodityisastraightlinepassingthroughtheorigin,andthepriceelasticityofitssupply
Youranswer:
B
Subjectscore:
0.5
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0.5
Annotation:
supplypriceelasticity=P/Q[1/（dP/dQ）]=1
Eighth,inordertoincreaserevenue,thegovernmentdecidedtolevytaxesonthesellersaccordingtotheamountofsales.Ifthegovernmentwantedthetaxburdentobearonthebuyeranddidnotaffectthevolumeofthetransactionasmuchaspossible,thentheconditionshouldbethat
Youranswer:
C
Subjectscore:
0.5
Score:
0.5
Note:
thetaxburdenfallsonthelesselasticside,if
Ninth,thefailureofwheatleadstoanincreaseinwheatprices,tobeexact,intheprocess
Youranswer:
A
Subjectscore:
0.5
Score:
0.5
Note:
wheatharvest,wheatsupplyreduction,theequilibriumquantitycorrespondingtothenewintersectionofthesupplycurveandthedemandcurveisreduced,itembodiestheparallelmove,reducingthesupplyofsupply,equilibriummovementalongthedemandcurve,demandreduction.
Thetenthitemfallsatthesametimethatboththedemandlevelandthesupplyleveldecrease
Youranswer:
D
Subjectscore:
0.5
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0.5
Note:
asyoucanseefromthegraph,thebalancedoutputmustbereducedandthepricebecomesuncertain.
Theshapeoftheeleventh-itemindifferencecurvedependson
Youranswer:
A
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0.5
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0.5
Note:
indifferencecurvesrepresentconsumerpreferences
Twelfth,ifanindifferencecurveishorizontal,thisindicatesthattheconsumerhasreachedsaturation（X）measuredbythecrossaxisandYbyaverticalaxis
Youranswer:
A
Subjectscore:
0.5
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0.5
Annotation:
ahorizontalindifferencecurveindicatingthat,regardlessofthequantityofXproducts,theutilityisthesametoconsumers.So,Xgoodsaresaturatedforconsumers.
Thethirteenth-itemindifferencecurveassumesthatthemarginalrateofsubstitutionofthegoodsXandYequalstheir
Youranswer:
C
Subjectscore:
0.5
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0.5
Annotation:
thisformulacanbeobtainedbydefinition.
Fourteenth,asincomeandpriceschange,consumerequilibriumhaschanged.Inthenewequilibrium,themarginalutilityofvariousgoodsislowerthanthemarginalutilityoftheoriginalequilibrium
Youranswer:
A
Subjectscore:
0.5
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0.5
Annotation:
accordingtothelawofdiminishingmarginalutility,themorethetwogoodsconsume,thelowerthemarginalutility,thegreaterthetotalutilityoftheconsumer.
ThefifteenthquestionassumesthatthepriceofXandYhasbeenfixed.WhenMRSXY>PX/PY,theconsumerwillmeetthegreatestsatisfaction,hewill
Youranswer:
A
Subjectscore:
0.5
Score:
0.5
Annotation:
accordingtotheformula,ifincreasingtheconsumptionofXgoods,theincreaseinmarginalutilitywillbegreaterthanthedecreaseinmarginalutilityresultingfromthereductionofYcommodityconsumption.
Sixteenth,theriseinpricesofnormalitemshasledtoadecreaseindemand
Youranswer:
C
Subjectscore:
0.5
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0.5
Comment:
atthistime,whetheritisthesubstitutioneffectortheincomeeffect,theconsumptionofthiskindofgoodsisreducedbytheconsumers.
Theseventeenthquestion,whenAPLispositive,butincrements,MPLis
Youranswer:
D
Subjectscore:
0.5
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0.5
Annotation:
accordingtofigure,therelationbetweenmarginalproductionandaverageoutput,whenthemarginalproductionisgreaterthantheaverageoutput,theaverageoutputincreasesprogressively.
Intheeighteenthquestion,thefollowingstatementiswrong
Youranswer:
B
Subjectscore:
0.5
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0.5
Annotation:
accordingtotherelationbetweenmarginalproductionandtotaloutput,themarginalproductiondecreases,butthetotaloutputstillincreasesaslongasheisgreaterthanzero.
Inthenineteenthquestion,whatfollowsiscorrect
Youranswer:
D
Subjectscore:
0.5
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0.5
Note:
onlythelastansweriscorrect,diminishingmarginalreturnsleadstodiminishingmarginalrateofsubstitutionbetweenthetwoelements.
Thetwentiethquestion,whenamanufacturerproducestheminimumamountofproductionataminimumcost,he
Youranswer:
D
Subjectscore:
0.5
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0.5
Annotation:
forexample,amonopolisticmanufacturerwhoseprofitmaximizationpointofproductionislessthantheaveragecostofproductionatthistime.
Twenty-first,theshortandlongtermdivisionofeconomicsdependson
Youranswer:
D
Subjectscore:
0.5
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0.5
Annotation:
ineconomics,intheshortrun,onlythequantityoflaborcanbeadjusted,andinthelongrunthequantityoflaborandcapitalcanbeadjusted.
Whichofthefollowingstatementsistrueofthetwenty-secondquestion?
Youranswer:
B
Subjectscore:
0.5
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0.5
Note:
continuousincreaseinproductionmayoccuratthebeginningofdecreasingcosts,theopportunitycostoftheUniversityalsoincludestheincomeoftheworktobeabandoned.
Twenty-third,thelong-termtotalcostcurveistheproductofallkinds
Youranswer:
A
Subjectscore:
0.5
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0.5
Annotation:
thetrajectoryofthelowestcostpoint
Twenty-fourth,whenthelawofdiminishingreturnstakeseffect,theTVCcurve
Youranswer:
D
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0.5
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0.5
Annotation:
Thetwenty-fifthproblemisthelinefromtheoriginandthepointoftheTCcurve,AC
Youranswer:
B
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0.5
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0.5
Annotation:
Inthetwenty-sixthquestion,whentheyieldis99units,thetotalcostisequalto995yuan.WhentheoutputincreasestoA00units,theaveragecostisequaltoA0yuan,sothatthemarginalcostis
Youranswer:
B
Subjectscore:
0.5
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0.5
Annotation:
thetotalincomeequalsthesumofthemarginalrevenue,andthetotalincomeof99unitsis1000ofthetotalincomeof995100units,sothemarginalincomeofthe100thgoodsisequalto5.
Inthetwenty-seventhquestion,whatfollowsiscorrect
Youranswer:
B
Subjectscore:
0.5
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0.5
Annotation:
marginalcostincreaseandmarginalrevenuedecreasearethesamereason.
Twenty-eighth,theprivatemarketisdifficulttoprovidepublicgoods
Youranswer:
D
Subjectscore:
0.5
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0.5
Note:
afreeriderisapublicgoodthatdoesnotpayforhim,sothereisnoprivateoffer
Whichofthefollowingtwenty-ninthquestionsisthepotentialsolutiontotheproblemofairpollution?
Youranswer:
B
Subjectscore:
0.5
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0.5
Annotation:
aslongasthedefinitionofpropertyrightsisclear,theexternalitycanbesolvedthroughthemarket
Thirtieth,acrowdedtollroadis
Youranswer:
A
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0.5
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0.5
Note:
Thisisbothcompetitiveandexclusive,soit'spersonal.
Thirty-first,whenthemarketfailstoallocateresourceseffectively,theultimatesourceoftheproblemisusually
Youranswer:
C
Subjectscore:
0.5
Score:
0.5
Annotation:
aslongasthedefinitionofpropertyrightsisclear,theexternalitycanbesolvedthroughthemarket
Thirty-secondquestion,iftheoutputofacompetitionenterprisedoubled,itstotalincome
Youranswer:
B
Subjectscore:
0.5
Score:
0.5
Note:
totalincome=price*output,totalcompetitivemarketpriceunchanged,sototalrevenuedoubled.
Thirty-third,inthelongrun,thesupplycurveofthecompetingfirmsis...
Youranswer:
B
Subjectscore:
0.5
Score:
0.5
Annotation:
afullycompetitiveindustry,inthelongrun,thepriceshouldbeequaltothemarginalcost,
Thepriceishigherthantheaveragecost,sothesupplycurveshouldbeapartofthemarginalcostcurveabovetheaveragecostcurve
Thirty-fourth,iftheinputneededbyproductionislimitedandtheindustryexpands,resultinginanincreaseinthecostofallfirmsonthemarket,thenthelong-runmarketsupplycurveforan
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