《国际经济学》教师手册及课后习题答案克鲁格曼第六版imch13.docx
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《国际经济学》教师手册及课后习题答案克鲁格曼第六版imch13.docx
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《国际经济学》教师手册及课后习题答案克鲁格曼第六版imch13
HAPTER13
ExchangeRatesandtheForeignExchangeMarket:
AnAssetApproach
ChapterOrganization
ExchangeRatesandInternationalTransactions
DomesticandForeignPrices
ExchangeRatesandRelativePrices
Box:
ATaleofTwoDollars
TheForeignExchangeMarket
TheActors
CharacteristicsoftheMarket
SpotRatesandForwardRates
ForeignExchangeSwaps
FuturesandOptions
TheDemandforForeignCurrencyAssets
AssetsandAssetReturns
RiskandLiquidity
InterestRates
ExchangeRatesandAssetReturns
ASimpleRule
Return,Risk,andLiquidityintheForeignExchangeMarket
EquilibriumintheForeignExchangeMarket
InterestParity:
TheBasicEquilibriumCondition
HowChangesintheCurrentExchangeRateAffectExpectedReturns
TheEquilibriumExchangeRate
InterestRates,Expectations,andEquilibrium
TheEffectofChangingInterestRatesontheCurrentExchangeRate
TheEffectofChangingExpectationsontheCurrentExchangeRate
Box:
ThePerilsofForecastingExchangeRates
Summary
Appendix:
ForwardExchangeRatesandCoveredInterestParity
ChapterOverview
Thepurposeofthischapteristoshowtheimportanceoftheexchangerateintranslatingforeignpricesintodomesticvaluesaswellastobeginthepresentationofexchange-ratedetermination.Centraltothetreatmentofexchange-ratedeterminationistheinsightthatexchangeratesaredeterminedinthesamewayasotherassetprices.Thechapterbeginsbydescribinghowtherelativepricesofdifferentcountries'goodsareaffectedbyexchangeratechanges.Thisdiscussionillustratesthecentralimportanceofexchangeratesforcross-bordereconomiclinkages.Thedeterminationoftheleveloftheexchangerateismodeledinthecontextoftheexchangerate'sroleastherelativepriceofforeignanddomesticcurrencies,usingtheuncoveredinterestparityrelationship.
Theeuroisusedofteninexamples.Somestudentsmaynotbefamiliarwiththecurrencyorawareofwhichcountriesuseit;abriefdiscussionmaybewarranted.AfulltreatmentofEMUandthetheoriessurroundingcurrencyunificationappearsinChapter20.
Thedescriptionoftheforeign-exchangemarketstressestheinvolvementoflargeorganizations(commercialbanks,corporations,nonbankfinancialinstitutions,andcentralbanks)andthehighlyintegratednatureofthemarket.Thenatureoftheforeign-exchangemarketensuresthatarbitrageoccursquickly,sothatcommonratesareofferedworldwide.Forwardforeign-exchangetrading,foreign-exchangefuturescontractsandforeign-exchangeoptionsplayanimportantpartincurrencymarketactivity.Theuseofthesefinancialinstrumentstoeliminateshort-runexchange-rateriskisdescribed.
Theexplanationofexchange-ratedeterminationinthischapteremphasizesthemodernviewthatexchangeratesmovetoequilibrateassetmarkets.Theforeign-exchangedemandandsupplycurvesthatintroduceexchange-ratedeterminationinmostundergraduatetextsarenotfoundhere.Instead,thereisadiscussionofassetpricingandthedeterminationofexpectedratesofreturnonassetsdenominatedindifferentcurrencies.
Studentsmayalreadybefamiliarwiththedistinctionbetweenrealandnominalreturns.Thetextdemonstratesthatnominalreturnsaresufficientforcomparingtheattractivenessofdifferentassets.Thereisabriefdescriptionoftheroleplayedbyriskandliquidityinassetdemand,buttheseconsiderationsarenotpursuedinthischapter.(TheroleofriskistakenupagaininChapter17.)
Substantialspaceisdevotedtothetopicofcomparingexpectedreturnsonassetsdenominatedindomesticandforeigncurrency.Thetextidentifiestwopartsoftheexpectedreturnonaforeign-currencyasset(measuredindomestic-currencyterms):
theinterestpaymentandthechangeinthevalueoftheforeigncurrencyrelativetothedomesticcurrencyovertheperiodinwhichtheassetisheld.Theexpectedreturnonaforeignassetiscalculatedasafunctionofthecurrentexchangerateforgivenexpectedvaluesofthefutureexchangerateandtheforeigninterestrate.
Theabsenceofriskandliquidityconsiderationsimpliesthattheexpectedreturnsonallassetstradedintheforeign-exchangemarketmustbeequal.Itisthusashortstepfromcalculationsofexpectedreturnsonforeignassetstotheinterestparitycondition.Theforeign-exchangemarketisshowntobeinequilibriumonlywhentheinterestparityconditionholds.Thus,forgiveninterestratesandgivenexpectationsaboutfutureexchangerates,interestparitydeterminesthecurrentequilibriumexchangerate.Theinterestparitydiagramintroducedhereisinstrumentalinlaterchaptersinwhichamoregeneralmodelispresented.Sinceacommandofthisinterestparitydiagramisanimportantbuildingblockforfuturework,werecommenddrillsthatemploythisdiagram.
Theresultthatadoll
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