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1、武汉大学2010-2011学年第二学期期末考试经济与管理学院2010级2011年6月29日《宏观经济学》试题（A卷）PrinciplesofMacroeconomics(PaperA)InstructionYouhavetwohourstocompletethistest.Fullmarksare100points.Writeyouranswersontheanswersheet.WhileyouareallowedtoanswereitherinEnglishorChinese,itwouldb
2、emoregradedatareasonabledegreeifyouchoosetodoitinEnglish.Readthequestionscarefullybeforeansweringthem.Bepreciseandkeeptothepoint.Goodluck!1.(10points)OnedayBarryandBarber,Inc.,collects$400forhaircuts.Overthisday,hisequipmentdepreciatesinvalueby$50.Oft
3、heremaining$350,Barrysends$30tothegovernmentinsalestaxes,takeshome$220inwages,andretains$100inhisbusinesstoaddnewequipmentinthefuture.Fromthe$220thatBarrytakeshome,hepays$70inincometaxes.Basedonthisinformation,computeBarry’scontributiontothefollowingm
4、easuresofincome.a.Grossdomesticproductb.Netnationalproductc.Nationalincomed.Personalincomee.Disposablepersonalincome2.(10points)Explainthedifferencebetweensavingandinvestmentasdefinedbyamacroeconomist.Whichofthefollowingsituationsrepresentinvestment?S
5、aving?Explain.a.Yourfamilytakesoutamortgageandbuysanewhouse.b.Youuseyour$200paychecktobuystockinAT&T.c.Yourroommateearns$100anddepositsitinheraccountatabank.d.Youborrow$1000fromabanktobuyacartouseinyourpizzadeliverybusiness.1.(10points)Listallforcesth
6、atinfluencemacroeconomicperformanceofacountry.Whichofthembelongstoaggregatesupplysideandwhichtoaggregatedemandside？Inthelongrun,canthecentralbankhavetheeconomytogrowcontinuouslyonlybyuseofexpansionarymonetarypolicysuchascontinuingincreaseinmoney?2.(15
7、points)Overthepastdecade,manyofChinesesavinghasbeenusedtofinanceAmericaninvestment.Thatis,ChinesegovernmenthasbeenbuyingAmericancapitalassets,especiallytheU.S.treasurybonds.a.IfChinesegovernmentdecideditnolongerwantedtobuyU.S.assets,whatwouldhappenint
8、heU.S.marketforloanablefunds?Inparticular,whatwouldhappentoU.S.interestrates,U.S.saving,andU.S.investment?b.WhatwouldhappentothevalueofthedollarandtheU.S.tradebalance?3.(15points)Foreachofthefollowingevents,explaintheshort-runandlong-runeffect
