Copyright ©2000, South-Western College Publishing International Economics By Robert J. Carbaugh 7th Edition Chapter 2: Foundations of modern trade theory
Carbaugh, Chap. 2 2 Historical development of trade theory Mercantilism positive trade balance Absolute advantage (Adam Smith) Countries benefit from exporting what they make cheaper than anyone else Comparative advantage (David Ricardo) Nations can gain from specialization, even if they lack an absolute advantage Foundations of trade theory
Carbaugh, Chap. 2 3 Absolute & Comparative Advantage Comparative advantage Absolute advantage: each nation is more efficient in producing one good Output per labor hour NationWineCloth United States5 bottles20 yards United Kingdom15 bottles8 yards Comparative advantage: the US has an absolute advantage in both goods Output per labor hour NationWineCloth United States40 bottles40 yards United Kingdom20 bottles10 yards
Carbaugh, Chap. 2 4 Ricardo’s Comparative Advantage in money prices Comparative advantage Cloth(yards)Wine(bottles) NationLaborWageQuant. PriceQuant.Price US1 hr$20/hr40$0.5040$0.50 UK1 hr£5/hr10£0.5020£0.25 UK1 hr$810$0.8020$0.40 (at $1.6 = £1)
Carbaugh, Chap. 2 5 Transformation schedules Generalizes theory to include all factors, not just labor Shows combinations of products that can be made if all factors are used efficiently Slope, or marginal rate of transformation, shows the opportunity cost of making more of one good (how much of one good must be given up to make more of another) Comparative advantage
Carbaugh, Chap. 2 6 Marginal Rate of Transformation Comparative advantage A B C Slope = MRT = 0.5 Wheat
Carbaugh, Chap. 2 7 Transformation schedules: constant opportunity costs Comparative advantage Slope = 0.5 = MRT Slope = 2.0 = MRT Wheat
Carbaugh, Chap. 2 8 Supply schedules: constant opportunity costs Comparative advantage S Canada S US S Canada Bushels of wheat per auto Autos per bushel of wheat
Carbaugh, Chap. 2 9 Trading under constant opportunity costs Comparative advantage A B C D E F Trading possibilities line (terms of trade 1:1) A’ B’ C’ D’ Trading possibilities line (terms of trade 1:1) Wheat
Carbaugh, Chap Production gains from specialization: constant opportunity costs Comparative advantage AutosWheatAutos WheatAutosWheat US Canada World BeforeAfterNet Gain SpecializationSpecialization(Loss)
Carbaugh, Chap Consumption gains from trade: constant opportunity costs Comparative advantage AutosWheatAutos WheatAutosWheat US Canada World BeforeAfterNet Gain SpecializationSpecialization(Loss)
Carbaugh, Chap Complete specialization under constant opportunity costs Comparative advantage S Canada S US S Canada AwAw AaAa Aa’ Aw’ Bushels of wheat per auto Autos per bushel of wheat
Carbaugh, Chap Changing comparative advantage Comparative advantage MRT = 0.67 MRT = 0.5 Autos
Carbaugh, Chap Trade restrictions and gains from trade Comparative advantage A B C tt D E tt’ Crude oil
Carbaugh, Chap Transformation schedule under increasing costs Increasing opportunity costs A B Slope 1A = 1W Slope 1A = 4W Wheat
Carbaugh, Chap Supply schedule under increasing costs Increasing opportunity costs A B Supply curve of autos Bushels of wheat per auto
Carbaugh, Chap Trading under increasing costs: US Increasing opportunity costs A t US (1A = 0.33W) B C D tt (1A =1W) Trading possibilities line Wheat
Carbaugh, Chap Trading under increasing costs: Canada Increasing opportunity costs A’ t C (1A = 3W) B’ C’ D’ tt (1A =1W) Trading possibilities line Wheat
Carbaugh, Chap Production gains from specialization: increasing opportunity costs AutosWheatAutos WheatAutosWheat US Canada World BeforeAfterNet Gain SpecializationSpecialization(Loss) Increasing opportunity costs
Carbaugh, Chap Consumption gains from trade: increasing opportunity costs AutosWheatAutos WheatAutosWheat US Canada World BeforeAfterNet Gain SpecializationSpecialization(Loss) Increasing opportunity costs