International Trade - Theory and Policy, 2010a

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6.3 Gains from Trade with Economies of Scale: A Simple Explanation LEARNING OBJECTIVE 1. Learn how a simple model can show the gains from trade when production involves economies of scale. The main reason the presence of economies of scale can generate trade gains is because the reallocation of resources can raise world productive efficiency. To see how, we present a simple example using a model similar to the Ricardian model. Basic Assumptions Suppose there are two countries, the United States and France, producing two goods, clothing and steel, using one factor of production, labor. Assume the production technology is identical in both countries and can be described with the production functions in Table 6.1 "Production of Clothing". Table 6.1 Production of Clothing United States QC=LC[hrs]aLC[hrsrack] France Q∗C=L∗CaLC where QC = quantity of clothing produced in the United States LC = amount of labor applied to clothing production in the United States aLC = unit labor requirement in clothing production in the United States and France (hours of labor necessary to produce one rack of clothing) ∗All starred variables are defined in the same way but refer to the production process in France. Note that since production technology is assumed to be the same in both countries, we use the same unit labor requirement in the U.S. and French production functions. Production of steel. The production of steel is assumed to exhibit economies of scale in production (see Table 6.2 "Production of Steel"). Table 6.2 Production of Steel United States QS=LS[hrs]aLS(QS)[hrstons] France Q∗S=L∗SaLS(Q∗S) Saylor URL: http://www.saylor.org/books Saylor.org 275
where QS = quantity of steel produced in the United States LS = amount of labor applied to steel production in the United States aLS(QS) = unit labor requirement in steel production in the United States (hours of labor necessary to produce one ton of steel) ∗All starred variables are defined in the same way but refer to the production process in France. Note that it is assumed that the unit labor requirement is a function of the level of steel output in the domestic industry. More specifically, we will assume that the unit labor requirement falls as industry output rises. Resource constraint. The production decision is how to allocate labor between the two industries. We assume that labor is homogeneous and freely mobile between industries. The labor constraints are given in Table 6.3 "Labor Constraints". Table 6.3 Labor Constraints United States France LC + LW = L L∗C+L∗W=L∗ where L = labor endowment When the resource constraint holds with equality, it implies that the resource is fully employed. Demand. We will assume that the United States and France have identical demands for the two products. A Numerical Example We proceed much as David Ricardo did in presenting the argument of the gains from specialization in one’s comparative advantage good. First, we will construct an autarky equilibrium in this model assuming that the two countries are identical in every respect. Then we will show how an improvement in world productive efficiency can arise if one of the two countries produces all the steel that is demanded in the world. Suppose the exogenous variables in the two countries take the values in Table 6.4 "Initial Exogenous Variable Values". Table 6.4 Initial Exogenous Variable Values Saylor URL: http://www.saylor.org/books Saylor.org 276
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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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conference attended by the main all
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One of the key principles of the GA
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arriers. [1] The trade remedy laws
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ound tariff rate the country reache
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instead, they are put into place ov
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5. The WTO principle to treat an im
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subsidies. Recall that export subsi
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As a result of Uruguay Round negoti
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Agreement, or TRIPS. The TRIPS inte
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1.7 The World Trade Organization LE
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1. Consultations. The DSB first dem
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countries from choosing more destru
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P, P+ CAFTA-DR FTA PE MA OM R SG U.
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0806.10.20 $1.13/m 3 (Feb. 15-Mar.
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Tariffs vary according to time of e
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1.9 Appendix B: Bound versus Applie
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EXERCISE 1. Jeopardy Questions. As
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2.1 The Reasons for Trade LEARNING
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For example, the Ricardian model of
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2. Learn the major historical figur
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could end up with more of both good
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The primary issue in the analysis o
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Real wages (and incomes) of individ
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he begins planting seeds in the sec
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In this way, we might raise the wel
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2.3 Ricardian Model Assumptions LEA
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Utility Maximization and Demand In
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United States L C + L W = L France
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2. Suppose that the unit labor requ
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KEY TAKEAWAYS The equation aLC QC
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comparative advantage in newspaper
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−aLCaLW⎡⎣⎢hrslbhrsgal=gallb
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KEY TAKEAWAYS Labor productivity i
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2.6 A Ricardian Numerical Example L
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With full employment of labor, prod
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At this point, we can already see a
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The answer to some of these questio
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wC=PCaLC. If production occurs in t
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Thus a good way to think about how
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Similarly, by rearranging the above
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production. But where will they fin
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The focus on real wages allows us t
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Real Wages in Autarky To calculate
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exchange. Thus the real wage of che
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2.11 The Welfare Effects of Free Tr
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Free trade will raise aggregate wel
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Chapter 3 The Pure Exchange Model o
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A Simple Example of Trade Suppose t
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3.2 Determinants of the Terms of Tr
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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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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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Page 250 and 251: Our prime concern, however, is the
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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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8.1 Chapter Overview LEARNING OBJEC
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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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