International Trade - Theory and Policy, 2010a

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2.3 Ricardian Model Assumptions LEARNING OBJECTIVE 1. Learn the structure and assumptions that describe the Ricardian model of comparative advantage. The Ricardian model shows the possibility that an industry in a developed country could compete against an industry in a less-developed country (LDC) even though the LDC industry pays its workers much lower wages. The modern version of the Ricardian model assumes that there are two countries producing two goods using one factor of production, usually labor. The model is a general equilibrium model in which all markets (i.e., goods and factors) are perfectly competitive. The goods produced are assumed to be homogeneous across countries and firms within an industry. Goods can be costlessly shipped between countries (i.e., there are no transportation costs). Labor is homogeneous within a country but may have different productivities across countries. This implies that the production technology is assumed to differ across countries. Labor is costlessly mobile across industries within a country but is immobile across countries. Full employment of labor is also assumed. Consumers (the laborers) are assumed to maximize utility subject to an income constraint. Below you will find a more complete description of each assumption along with a mathematical formulation of the model. Perfect Competition Perfect competition in all markets means that the following conditions are assumed to hold. Saylor URL: http://www.saylor.org/books Saylor.org 79
1. Many firms produce output in each industry such that each firm is too small for its output decisions to affect the market price. This implies that when choosing output to maximize profit, each firm takes the price as given or exogenous. 2. Firms choose output to maximize profit. The rule used by perfectly competitive firms is to choose the output level that equalizes the price (P) with the marginal cost (MC). That is, set P = MC. 3. Output is homogeneous across all firms. This means that goods are identical in all their characteristics such that a consumer would find products from different firms indistinguishable. We could also say that goods from different firms are perfect substitutes for all consumers. 4. There is free entry and exit of firms in response to profits. Positive profit sends a signal to the rest of the economy and new firms enter the industry. Negative profit (losses) leads existing firms to exit, one by one, out of the industry. As a result, in the long run economic profit is driven to zero in the industry. 5. Information is perfect. For example, all firms have the necessary information to maximize profit and to identify the positive profit and negative profit industries. Two Countries The case of two countries is used to simplify the model analysis. Let one country be the United States and the other France. Note that anything related exclusively to France in the model will be marked with an asterisk. The two countries are assumed to differ only with respect to the production technology. Two Goods Two goods are produced by both countries. We assume a barter economy. This means that no money is used to make transactions. Instead, for trade to occur, goods must be traded for other goods. Thus we need at least two goods in the model. Let the two produced goods be wine and cheese. One Factor of Production Labor is the one factor of production used to produce each of the goods. The factor is homogeneous and can freely move between industries. Saylor URL: http://www.saylor.org/books Saylor.org 80
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This text was adapted by The Saylor
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Chapter 1 Introductory Trade Issues
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However, rapid growth in the value
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As of 2009, 153 countries were memb
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International trade is a field in e
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imported, the U.S. government colle
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Kenya 12.7 Ghana 13.1 Generally spe
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Average tariffs can be measured as
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When the bubble bursts, the demand
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missed deadlines are commonplace in
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a well-known “bicycle theory” a
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But at the same time that many deve
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Recent opposition to trade liberali
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ought back to the United States and
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Page 32 and 33: One of the key principles of the GA
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Page 38 and 39: instead, they are put into place ov
Page 40 and 41: 5. The WTO principle to treat an im
Page 42 and 43: subsidies. Recall that export subsi
Page 44 and 45: As a result of Uruguay Round negoti
Page 46 and 47: Agreement, or TRIPS. The TRIPS inte
Page 48 and 49: 1.7 The World Trade Organization LE
Page 50 and 51: 1. Consultations. The DSB first dem
Page 52 and 53: countries from choosing more destru
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Page 56 and 57: 0806.10.20 $1.13/m 3 (Feb. 15-Mar.
Page 58 and 59: Tariffs vary according to time of e
Page 60 and 61: 1.9 Appendix B: Bound versus Applie
Page 62 and 63: EXERCISE 1. Jeopardy Questions. As
Page 64 and 65: 2.1 The Reasons for Trade LEARNING
Page 66 and 67: For example, the Ricardian model of
Page 68 and 69: 2. Learn the major historical figur
Page 70 and 71: could end up with more of both good
Page 72 and 73: The primary issue in the analysis o
Page 74 and 75: Real wages (and incomes) of individ
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Page 78 and 79: In this way, we might raise the wel
Page 82 and 83: Utility Maximization and Demand In
Page 84 and 85: United States L C + L W = L France
Page 86 and 87: 2. Suppose that the unit labor requ
Page 88 and 89: KEY TAKEAWAYS The equation aLC QC
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Page 92 and 93: −aLCaLW⎡⎣⎢hrslbhrsgal=gallb
Page 94 and 95: KEY TAKEAWAYS Labor productivity i
Page 96 and 97: 2.6 A Ricardian Numerical Example L
Page 98 and 99: With full employment of labor, prod
Page 100 and 101: At this point, we can already see a
Page 102 and 103: The answer to some of these questio
Page 104 and 105: wC=PCaLC. If production occurs in t
Page 106 and 107: Thus a good way to think about how
Page 108 and 109: Similarly, by rearranging the above
Page 110 and 111: production. But where will they fin
Page 112 and 113: The focus on real wages allows us t
Page 114 and 115: Real Wages in Autarky To calculate
Page 116 and 117: exchange. Thus the real wage of che
Page 118 and 119: 2.11 The Welfare Effects of Free Tr
Page 120 and 121: Free trade will raise aggregate wel
Page 122 and 123: Chapter 3 The Pure Exchange Model o
Page 124 and 125: A Simple Example of Trade Suppose t
Page 126 and 127: 3.2 Determinants of the Terms of Tr
Page 128 and 129: Persuasion The art of persuasion ca
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KEY TAKEAWAY The terms of trade is
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two individuals make a voluntary ex
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3.4 Three Traders and Redistributio
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is not motivated by profit but inst
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The changes described above assume
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3.6 The Nondiscrimination Argument
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clothing worker. The same applies i
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the page, scroll down to the “Bou
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4.1 Factor Mobility Overview LEARNI
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argument that free trade can only b
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them, but only if the prices are ve
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4.3 Time and Factor Mobility LEARNI
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EXERCISE 1. Jeopardy Questions. As
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factor to be moved and become produ
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KEY TAKEAWAY The immobile factor m
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wine workers and cheese workers. Th
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In autarky, the quantity demanded o
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4.7 Depicting a Free Trade Equilibr
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0 the variable does not change A th
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Thus cheese workers are most likely
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Real Wage of Wheat Workers in Terms
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wages. However, these extra profits
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French production and consumption i
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5.1 Chapter Overview LEARNING OBJEC
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less-developed countries have much
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would rise, while the wage rate wou
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Ricardian model, then factor prices
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4. This is by which industries diff
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where KC and KS are the quantities
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Let aLC[labor−hrsrack] represent
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The capital-labor ratio in an indus
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that would employ all the capital i
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The Relationship between Endowments
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Suppose the exogenous variables of
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Adding these two equations vertical
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3. Write the magnification effect f
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tariffs or other government regulat
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If the price of clothing had risen,
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Table 5.6 Numerical Values for Exog
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w∧>PC∧>PS∧>r∧. The effect i
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2. Suppose the price of cheese fall
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this requires a fair amount of adva
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workers per unit of capital in the
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of quantities CS″/CC″. Since CS
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In Figure 5.8 "Free Trade Equilibri
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5.11 National Welfare Effects of Fr
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calculating changes in real income
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who has deposits in a pension plan
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export industry in order to benefit
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Income is redistributed among indiv
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Thus it is always possible to find
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affects the capital-labor ratios in
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1. Describe the pattern of factor f
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assumed to be freely and costlessly
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expansion of output in the export s
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[1] See R. W. Jones, “A Three-Fac
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product line for a representative t
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The total amount of revenue earned
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The horizontal length of Figure 5.1
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Our prime concern, however, is the
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An alternative version of the magni
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8. The magnification effect for pri
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can be used to transport tomatoes o
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esponds to the excess supply of wor
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The effect on workers is, in genera
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Factor Rewards over Time Now let’
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Figure 5.20 Dynamic Import-Capital
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In summary, the models suggest that
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[1] See J. P. Neary, “Short-Run C
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6.2 Economies of Scale and Returns
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produced and if the costs of this e
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6.3 Gains from Trade with Economies
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United States aLC = 1 L = 100 Franc
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thirty racks of clothing, then each
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model best describes markets in whi
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2. Each firm produces a product tha
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2. The demand assumption in which e
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Keep in mind that this is the equil
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KEY TAKEAWAYS A market equilibrium
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1. If the product is such that an i
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varieties may increase aggregate we
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7.1 Basic Assumptions of the Partia
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2. The term used to describe a coun
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where XSUS(.) is the export supply
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This implies also that world supply
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1. The price that equalizes one cou
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The price that ultimately prevails
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Surplus", some firm would be willin
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Changes in Producer Surplus Suppose
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2. The term used to describe a meas
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the same price for their product re
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to purchase the Mexican wheat at $1
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The effect on the foreign price is
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The quantity of imports and exports
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the sum of the gains exceeds the su
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indicate the effect of each policy
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7.6 The Optimal Tariff LEARNING OBJ
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zero. Somewhere between a zero tari
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3. The tariff rate that corresponds
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KEY TAKEAWAYS An import tariff wil
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7.8 Import Tariffs: Small Country W
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3. The tariff causes a redistributi
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1. Where on the graph is the level
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We examine the effects of optimal t
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3. Given player one’s optimal pol
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The goal of a cooperative equilibri
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1. Use the information provided in
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7.10 Import Quotas: Large Country P
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An import quota will reduce the qua
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KEY TAKEAWAYS To administer a quot
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demand is equal to the quota level.
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market decreases producer surplus i
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Foreign National Welfare 2. Suppose
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This implies that, in the case of a
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Quota Rents National Welfare + C
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Import Quota (Administered by Givin
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to as tariffication. In this way, f
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Next, consider the effects in this
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In situations where market changes
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where S is the specific export subs
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7.17 Export Subsidies: Large Countr
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the subsidy payments are made, then
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An export subsidy of any size will
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2. Identify the effects of a counte
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Table 7.12 "Welfare Effects of the
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Consumer Surplus − (G + H + I + J
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KEY TAKEAWAYS An antisubsidy law,
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9. What is the change in government
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Notice that a unique set of prices
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in the import country and in the ca
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Figure 7.36 Welfare Effects of a VE
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the quota rents will benefit, but p
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A the variable change is ambiguous
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Mexico, and all wheat sold in Mexic
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7.23 Export Taxes: Large Country We
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Because there are both positive and
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− the variable decreases 0 the va
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If a domestic consumption tax is im
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Equivalency between Domestic and Tr
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An import tariff applied on an impo
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KEY TAKEAWAYS Domestic production
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a Domestic Production Subsidy", whi
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Domestic policies can affect trade
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+ the variable increases − the va
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Domestic consumption taxes are ofte
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Figure 8.3 Inducing Exports with a
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8.7 Consumption Tax Effects in a Sm
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Since the cost to consumers exceeds
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When a specific consumption tax “
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time of the founding of the nation,
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Chapter 9 Trade Policies with Marke
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Market imperfections or market dist
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firm’s welfare) by restricting su
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are neatly kept and homes are well
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Policy-Imposed Distortions Another
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In this section, we will provide an
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Welfare-Improving Policies in a Sec
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Summary of the Theory of the Second
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9.4 Unemployment and Trade Policy L
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Suppose that international market c
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9.2 "Welfare Effects of an Import T
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Begin with the same surge of import
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eliminate the same unemployment imp
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A the variable change is ambiguous
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their own production efficiency imp
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Suppose that the infant industry ar
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This means that in the second perio
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The Economic Argument against Infan
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world efficiency standards, protect
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9.6 The Case of a Foreign Monopoly
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Assuming the monopolist maximizes p
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Import tariff effects on the import
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This shows that although a tariff c
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2. Recognize that a trade policy ca
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consider a large importing country
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the subsidy is set too high, the lo
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9.8 Public Goods and National Secur
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nonexcludable because once it is th
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efficiency loss. Nevertheless, the
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5. The term describing a ìgoodî l
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the environment. On the other hand,
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Pollution Effect National Welfare
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Govt. Revenue Pollution Effect + e
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A Source of Controversy For many en
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This statement points out that many
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noneconomists, providing permits th
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[4] World Trade Organization, “Tr
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product categories. This type of tr
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The key question of interest concer
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Figure 9.10 "Harmful Trade Diversio
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Free trade area effects on Country
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We assume that A has a specific tar
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The simple way to do that is to ima
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Chapter 10 Political Economy and In
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do indeed seek to maximize national
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a representative democracy, governm
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3. This type of lobbying does not i
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much larger than the number of firm
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We can now ask whether a household
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Large groups are much less effectiv
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Because the per-producer benefit of
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clearly he or she would vote for th
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10.7 The Lobbying Problem in a Demo
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Chapter 11 Evaluating the Controver
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the results from any one model. Ins
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increase in national welfare. This
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4. The enhancement of this is what
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of the real world. The real world c
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Another way to deflect the concern
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For example, an optimal tariff or o
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Stuart Mill in hisPrinciples of Pol
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11.5 The Economic Case against Sele
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to eliminate some of the inefficien
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effects, it would then need to meas
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to avoid the use of any such policy
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Selected protection requires detail
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11.6 Free Trade as the “Pragmatic
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