中级宏观经济学及财务管理知识分析.pptx

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1、Prepared by Iordanis PetsasTo Accompany , Sixth Editionby Paul R. Krugman and Maurice Obstfeld1IntroductionBasic Tariff AnalysisCosts and Benefits of a TariffOther Instruments of Trade PolicyThe Effects of Trade Policy: A SummarySummaryAppendix I: Tariff Analysis in General EquilibriumAppendix II: T

2、ariffs and Import Quotas in the Presence of MonopolyChapter Organization2IntroductionThis chapter is focused on the following questions:What are the effects of various trade policy instruments? Who will benefit and who will lose from these trade policy instruments?What are the costs and benefits of

3、protection? Will the benefits outweigh the costs?What should a nations trade policy be? For example, should the United States use a tariff or an import quota to protect its automobile industry against competition from Japan and South Korea?3Classification of Commercial Policy Instruments Introductio

4、nCommercial Policy InstrumentsTrade Contraction Trade Expansion Tariff Export taxImport quotaVoluntary Export Restraint (VER)Import subsidyExport subsidyVoluntary Import Expansion (VIE) Price Quantity Price Quantity 4Basic Tariff AnalysisTariffs can be classified as:Specific tariffs Taxes that are l

5、evied as a fixed charge for each unit of goods imported Example: A specific tariff of $10 on each imported bicycle with an international price of $100 means that customs officials collect the fixed sum of $10.Ad valorem tariffs Taxes that are levied as a fraction of the value of the imported goods E

6、xample: A 20% ad valorem tariff on bicycles generates a $20 payment on each $100 imported bicycle.5A compound duty (tariff) is a combination of an ad valorem and a specific tariff. Modern governments usually prefer to protect domestic industries through a variety of nontariff barriers, such as: Impo

7、rt quotas Limit the quantity of imports Export restraints Limit the quantity of exportsBasic Tariff Analysis6Supply, Demand, and Trade in a Single IndustrySuppose that there are two countries (Home and Foreign).Both countries consume and produce wheat, which can be costless transported between the c

8、ountries.In each country, wheat is a competitive industry.Suppose that in the absence of trade the price of wheat at Home exceeds the corresponding price at Foreign. This implies that shippers begin to move wheat from Foreign to Home. The export of wheat raises its price in Foreign and lowers its pr

9、ice in Home until the initial difference in prices has been eliminated.Basic Tariff Analysis7To determine the world price (Pw) and the quantity trade (Qw), two curves are defined:Home import demand curve Shows the maximum quantity of imports the Home country would like to consume at each price of th

10、e imported good. That is, the excess of what Home consumers demand over what Home producers supply: MD = D(P) S(P)Foreign export supply curve Shows the maximum quantity of exports Foreign would like to provide the rest of the world at each price. That is, the excess of what Foreign producers supply

11、over what foreign consumers demand: XS = S*(P*) D*(P*)Basic Tariff Analysis8Quantity, QPrice, PPrice, PQuantity, QMDDSAPAP2P1S2D2D2 S22S1D1D1 S11Figure 8-1: Deriving Homes Import Demand CurveBasic Tariff Analysis9Properties of the import demand curve:It intersects the vertical axis at the closed eco

12、nomy price of the importing country.It is downward sloping.It is flatter than the domestic demand curve in the importing country.Basic Tariff Analysis10P2P*AD*S*P1XSPrice, PPrice, PQuantity, QQuantity, QS*2 D*2S*2D*2Figure 8-2: Deriving Foreigns Export Supply CurveBasic Tariff AnalysisD*1S*1S*1 D*11

13、1Properties of the export supply curve:It intersects the vertical axis at the closed economy price of the exporting country.It is upward sloping.It is flatter that the domestic supply curve in the exporting country.Basic Tariff Analysis12Figure 8-3: World EquilibriumXSPrice, PQuantity, QMDPWQW1Basic

14、 Tariff Analysis13Useful definitions:The terms of trade is the relative price of the exportable good expressed in units of the importable good.A small country is a country that cannot affect its terms of trade no matter how much it trades with the rest of the world.The analytical framework will be b

15、ased on either of the following: Two large countries trading with each otherA small country trading with the rest of the worldBasic Tariff Analysis14Effects of a TariffAssume that two large countries trade with each other.Suppose Home imposes a tax of $2 on every bushel of wheat imported. Then shipp

16、ers will be unwilling to move the wheat unless the price difference between the two markets is at least $2.Figure 8-4 illustrates the effects of a specific tariff of $t per unit of wheat.Basic Tariff Analysis15XSPTMDD*S*DSPW2QT1QWBasic Tariff AnalysisFigure 8-4: Effects of a TariffP*T3tPrice, PQuant

17、ity, QPrice, PQuantity, QPrice, PQuantity, QHome marketWorld marketForeign marketHome marketWorld marketForeign market16In the absence of tariff, the world price of wheat (Pw) would be equalized in both countries.With the tariff in place, the price of wheat rises to PT at Home and falls to P*T (= PT

18、 t) at Foreign until the price difference is $t. In Home: producers supply more and consumers demand less due to the higher price, so that fewer imports are demanded. In Foreign: producers supply less and consumers demand more due to the lower price, so that fewer exports are supplied. Thus, the vol

19、ume of wheat traded declines due to the imposition of the tariff.Basic Tariff Analysis17The increase in the domestic Home price is less than the tariff, because part of the tariff is reflected in a decline in Foreign s export price. If Home is a small country and imposes a tariff, the foreign export

20、 prices are unaffected and the domestic price at Home (the importing country) rises by the full amount of the tariff.Basic Tariff Analysis18Figure 8-5: A Tariff in a Small CountrySPrice, PQuantity, QDPW + tPWImports after tariffS1D1Imports before tariffD2S2Basic Tariff Analysis19Measuring the Amount

21、 of ProtectionIn analyzing trade policy in practice, it is important to know how much protection a trade policy actually provides. One can express the amount of protection as a percentage of the price that would prevail under free trade. Two problems arise from this method of measurement: In the lar

22、ge country case, the tariff will lower the foreign export price. Tariffs may have different effects on different stages of production of a good.Basic Tariff Analysis20Effective rate of protection One must consider both the effects of tariffs on the final price of a good, and the effects of tariffs o

23、n the costs of inputs used in production. The actual protection provided by a tariff will not equal the tariff rate if imported intermediate goods are used in the production of the protected good. Example: A European airplane that sells for $50 million has cost $60 million to produce. Half of the pu

24、rchase price of the aircraft represents the cost of components purchased from other countries. A subsidy of $10 million from the European government cuts the cost of the value added to purchasers of the airplane from $30 to $20 million. Thus, the effective rate of protection is (30-20)/20 = 50%.Basi

25、c Tariff Analysis21Costs and Benefits of a TariffA tariff raises the price of a good in the importing country and lowers it in the exporting country.As a result of these price changes:Consumers lose in the importing country and gain in the exporting countryProducers gain in the importing country and

26、 lose in the exporting countryGovernment imposing the tariff gains revenueTo measure and compare these costs and benefits, we need to define consumer and producer surplus.22Consumer and Producer SurplusConsumer surplus It measures the amount a consumer gains from a purchase by the difference between

27、 the price he actually pays and the price he would have been willing to pay. It can be derived from the market demand curve. Graphically, it is equal to the area under the demand curve and above the price. Example: Suppose a person is willing to pay $20 per packet of pills, but the price is only $5.

28、 Then, the consumer surplus gained by the purchase of a packet of pills is $15.Costs and Benefits of a Tariff238$129$1010$911DFigure 8-6: Deriving Consumer Surplus from the Demand CurveCosts and Benefits of a TariffPrice, PQuantity, Q24Figure 8-7: Geometry of Consumer SurplusCosts and Benefits of a

29、TariffabP1P2DPrice, PQuantity, QQ2Q125Producer surplus It measures the amount a producer gains from a sale by the difference between the price he actually receives and the price at which he would have been willing to sell. It can be derived from the market supply curve. Graphically, it is equal to t

30、he area above the supply curve and below the price. Example: A producer willing to sell a good for $2 but receiving a price of $5 gains a producer surplus of $3.Costs and Benefits of a Tariff26Figure 8-8: Geometry of Producer SurplusCosts and Benefits of a TariffdcP2P1SPrice, PQuantity, QQ2Q127Costs

31、 and Benefits of a TariffMeasuring the Cost and BenefitsIs it possible to add consumer and producer surplus? We can (algebraically) add consumer and producer surplus because any change in price affects each individual in two ways: As a consumer As a worker We assume that at the margin a dollars wort

32、h of gain or loss to each group is of the same social worth.28Figure 8-9: Costs and Benefits of a Tariff for the Importing CountryCosts and Benefits of a TariffPTPWP*TbcdeDa= consumer loss (a + b + c + d)= producer gain (a)= government revenue gain (c + e)QTD2S2SS1D1Price, PQuantity, Q29The areas of

33、 the two triangles b and d measure the loss to the nation as a whole (efficiency loss) and the area of the rectangle e measures an offsetting gain (terms of trade gain). The efficiency loss arises because a tariff distorts incentives to consume and produce. Producers and consumers act as if imports

34、were more expensive than they actually are. Triangle b is the production distortion loss and triangle d is the consumption distortion loss. The terms of trade gain arises because a tariff lowers foreign export prices.Costs and Benefits of a Tariff30If the terms of trade gain is greater than the effi

35、ciency loss, the tariff increases welfare for the importing country. In the case of a small country, the tariff reduces welfare for the importing country.Costs and Benefits of a Tariff31Figure 8-10: Net Welfare Effects of a TariffPTPWP*TbdeD= efficiency loss (b + d)= terms of trade gain (e)ImportsSP

36、rice, PQuantity, QCosts and Benefits of a Tariff32Export Subsidies: TheoryExport subsidy A payment by the government to a firm or individual that ships a good abroad When the government offers an export subsidy, shippers will export the good up to the point where the domestic price exceeds the forei

37、gn price by the amount of the subsidy. It can be either specific or ad valorem.Other Instruments of Trade Policy33baFigure 8-11: Effects of an Export SubsidyOther Instruments of Trade PolicyPSPWP*SPrice, PQuantity, QExportsgfeSubsidydc= producer gain (a + b + c)= consumer loss (a + b)= cost of gover

38、nment subsidy (b + c + d + e + f + g)DS34An export subsidy raises prices in the exporting country while lowering them in the importing country.In addition, and in contrast to a tariff, the export subsidy worsens the terms of trade.An export subsidy unambiguously leads to costs that exceed its benefi

39、ts. Other Instruments of Trade Policy35Figure 8-12: Europes Common Agricultural ProgramOther Instruments of Trade PolicyPrice, PQuantity, QSDEU price without importsWorld price= cost of government subsidySupport priceExports36Import Quotas: TheoryAn import quota is a direct restriction on the quanti

40、ty of a good that is imported. Example: The United States has a quota on imports of foreign cheese.The restriction is usually enforced by issuing licenses to some group of individuals or firms. Example: The only firms allowed to import cheese are certain trading companies.In some cases (e.g. sugar a

41、nd apparel), the right to sell in the United States is given directly to the governments of exporting countries.Other Instruments of Trade Policy37An import quota always raises the domestic price of the imported good.License holders are able to buy imports and resell them at a higher price in the do

42、mestic market. The profits received by the holders of import licenses are known as quota rents.Other Instruments of Trade Policy38Welfare analysis of import quotas versus of that of tariffs The difference between a quota and a tariff is that with a quota the government receives no revenue. In assess

43、ing the costs and benefits of an import quota, it is crucial to determine who gets the rents. When the rights to sell in the domestic market are assigned to governments of exporting countries, the transfer of rents abroad makes the costs of a quota substantially higher than the equivalent tariff.Oth

44、er Instruments of Trade Policy39Price in U.S. Market 466World Price 280bcdDemanda8.456.32Supply5.149.26Price, $/tonQuantity of sugar,million tonsFigure 8-13: Effects of the U.S. Import Quota on SugarOther Instruments of Trade PolicyImport quota:2.13 million tons= consumer loss (a + b + c + d)= produ

45、cer gain (a)= quota rents (c)40Voluntary Export RestraintsA voluntary export restraint (VER) is an export quota administered by the exporting country. It is also known as a voluntary restraint agreement (VRA).VERs are imposed at the request of the importer and are agreed to by the exporter to forest

46、all other trade restrictions.Other Instruments of Trade Policy41A VER is exactly like an import quota where the licenses are assigned to foreign governments and is therefore very costly to the importing country.A VER is always more costly to the importing country than a tariff that limits imports by

47、 the same amount. The tariff equivalent revenue becomes rents earned by foreigners under the VER. Example: About 2/3 of the cost to consumers of the three major U.S. voluntary restraints in textiles and apparel, steel, and automobiles is accounted for by the rents earned by foreigners. A VER produce

48、s a loss for the importing country.Other Instruments of Trade Policy42Local Content RequirementsA local content requirement is a regulation that requires that some specified fraction of a final good be produced domestically. This fraction can be specified in physical units or in value terms.Local co

49、ntent laws have been widely used by developing countries trying to shift their manufacturing base from assembly back into intermediate goods.Other Instruments of Trade Policy43Local content laws do not produce either government revenue or quota rents. Instead, the difference between the prices of im

50、ports and domestic goods gets averaged in the final price and is passed on to consumers. Example: Suppose that auto assembly firms are required to use 50% domestic parts. The cost of imported parts is $6000 and the cost of the same parts domestically is $10,000. Then the average cost of parts is $80

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