chap2中级宏观经济学答案--华中科技大学

1Microeconomics,4e(Perloff)Chapter2SupplyandDemand2.1Demand1)AccordingtotheLawofDemand,thedemandcurveforagoodwillA)shiftleftwardwhenthepriceofthegoodincreases.B)shiftrightwardwhenthepriceofthegoodincreases.C)slopedownward.D)slopeupward.Answer:CTopic:Demand2)AnincreaseinthepriceofporkwillleadtoA)amovementupalongthedemandcurve.B)amovementdownalongthedemandcurve.C)arightwardshiftofthedemandcurve.D)aleftwardshiftofthedemandcurve.Answer:ATopic:Demand3)AnincreaseinconsumerincomeswillleadtoA)arightwardshiftofthedemandcurveforplasmaTVs.B)amovementupwardalongthedemandcurveforplasmaTVs.C)arightwardshiftofthesupplycurveforplasmaTVs.D)nochangeofthedemandcurveforplasmaTVs.Answer:ATopic:Demand4)ConsiderthedemandfunctionQd=150-2P.TheeffectsofotherdeterminantsofQdisreflectedinA)theinterceptofthefunction.B)theslopeofthefunction.C)neithertheslopenortheinterceptofthefunction.D)inboththeslopeandtheinterceptofthefunction.Answer:ATopic:Demand5)Considerthedemandfunctions:A)Qd=250-2PB)Qd=300-3P.Whichofthedemandfunctionsreflectsahigherlevelofconsumerincomes?A)AB)BC)AandBreflectthesameconsumerincomes.D)Moreinformationisneeded.Answer:DTopic:Demand6)Holdingallotherfactorsconstant,consumersdemandmoreofagoodtheA)higheritsprice.B)loweritsprice.C)steeperthedownwardslopeofthedemandcurve.D)steepertheupwardslopeofthedemandcurve.Answer:BTopic:Demand27)Asthepriceofagoodincreases,thechangeinthequantitydemandedcanbeshownbyA)shiftingthedemandcurveleftward.B)shiftingthedemandcurverightward.C)movingdownalongthesamedemandcurve.D)movingupalongthesamedemandcurve.Answer:DTopic:Demand8)Ifthepriceofautomobilesweretoincreasesubstantially,thedemandcurveforgasolinewouldmostlikelyA)shiftleftward.B)shiftrightward.C)becomeflatter.D)becomesteeper.Answer:ATopic:Demand9)Ifthepriceofautomobilesweretodecreasesubstantially,thedemandcurveforautomobileswouldmostlikelyA)shiftrightward.B)shiftleftward.C)remainunchanged.D)becomesteeper.Answer:CTopic:Demand10)Ifthepriceofautomobilesweretodecreasesubstantially,thedemandcurveforpublictransportationwouldmostlikelyA)shiftrightward.B)shiftleftward.C)remainunchanged.D)remainunchangedwhilequantitydemandedwouldchange.Answer:BTopic:Demand11)AnincreaseinthedemandcurvefororangejuicewouldbeillustratedasaA)leftwardshiftofthedemandcurve.B)rightwardshiftofthedemandcurve.C)movementupalongthedemandcurve.D)movementdownalongthedemandcurve.Answer:BTopic:Demand12)TheterminversedemandcurvereferstoA)ademandcurvethatslopesupward.B)expressingthedemandcurveintermsofpriceasafunctionofquantity.C)thedemandforinverses.D)thedifferencebetweenquantitydemandedandsuppliedateachprice.Answer:BTopic:Demand313)IfthedemandfororangesiswrittenasQ=100-5p,thentheinversedemandfunctionisA)Q=5p-100.B)Q=20-.2p.C)p=20-5Q.D)p=20-.2Q.Answer:DTopic:Demand14)Todeterminethetotaldemandforallconsumers,sumthequantityeachconsumerdemandsA)atagivenprice.B)atallpricesandthensumthisamountacrossallconsumers.C)BothAandBwillgeneratethesametotaldemand.D)Noneoftheabove.Answer:ATopic:Demand15)Theabovefigureshowsagraphofthemarketforpizzasinalargetown.NopizzaswillbedemandedunlesspriceislessthanA)$0.B)$5.C)$12.D)$14.Answer:DTopic:DemandForthefollowing,pleaseanswerTrueorFalseandexplainwhy.16)Ifagoodisnotproduced,thenthereisnodemandforit.Answer:False.Thedemandforaproductisindependentofitssupply.Itispossiblethatpeoplewanttobuysomeoftheproductbutatpricesthatarebelowwhatsellerswouldrequiretobeginproduction.Topic:Demand17)Becausepeopleprefername-brandpain-relievingdrugsoverstore-brandpain-relievingdrugs,demandcurvesdonotslopedownwardforpain-relievingdrugs.Answer:False.Demandcurvesslopedownwardassumingallotherfactorsdonotchange.Consumersmayviewbrand-namedrugstobeofhigherqualitythanstore-branddrugs,andthereforethedemandcurveforbrand-namedrugsliestotherightofthedemandcurveforstore-branddrugs.Topic:Demand418)Thequantityofagoodthatconsumersdemanddependsonlyonthepriceofthegood.Answer:False.Thequantityofagooddemandeddependsonmanyfactorsincluding:price,consumers'incomes,andthepriceofrelatedgoods.Topic:Demand19)Duringthewinterof1997-1998,thenortheasternUnitedStatesexperiencedwarmerthanusualconditions.Thepriceofhomeheatingoilwaslessthanitwasduringthepreviouswinter,butpeopleboughtlesshomeheatingoil.ThiscontradictstheLawofDemand.Answer:False.Thestatementclaimingacontradictionconfusesachangeinquantitydemandedwithachangeinthedemandcurve.Thelawofdemandreferstomovementsalongagivendemandcurve.Themildweathercausedaleftwardshiftofthedemandcurve.Topic:Demand20)SupposeanindividualinversedemandcurveisgivenasP=2-1/2qi,whereqiisthequantitydemandedbyindividuali.Thereare50individualconsumerswiththisidentical,individualinversedemandcurve.Solveforthemarketdemandcurve.Answer:Solvefortheindividual,regulardemandcurve,qi=4-2P.Multiplytheindividualdemandcurveby50toyieldqD=200-100P.Topic:Demand21)SupposethemarketdemandcurveforpizzacanbeexpressedasQD=100-2P+3Pb,whereQDisthequantityofpizzademanded,Pisthepriceofapizza,andPbisthepriceofaburrito.Whatistheslopeofthisdemandfunction,andwhatinformationdoestheslopeprovide?Answer:Theslopeis-