International Economics
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Dominick-Salvatore-International-Economics
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/P Y = P ∗ W = 0.625 on the world market and for Nation 2 as a whole. As a result, Nation 1’s (the rest of the world’s) terms of trade deteriorate from P X /P Y = P W = 1 to P X /P Y = P ∗ W = 0.625, and Nation 2’s terms of trade improve to P Y /P X = 1/P ∗ W = 1/0.625 = 1.6. With the tariff associated with offer curve 2 * , not only does the improvement in Nation 2’s welfare resulting from its improved terms of trade exceed the reduction in welfare due to the decline in volume of trade, but it represents the highest welfare that Nation 2 can achieve with a tariff (and exceeds its free trade welfare). (Again, the reason why the tariff associated with offer curve 2 * is the optimum tariff will be explained in Section A8.6 in the appendix by utilizing the trade indifference curves derived in Section A4.1 in the appendix to Chapter 4. Here we simply examine the effect of the optimum tariff on the nation imposing it and on its trade partner.) However, with deteriorated terms of trade and a smaller volume of trade, Nation 1 is def- initely worse off than under free trade. As a result, Nation 1 is likely to retaliate and impose an optimum tariff of its own, shown by offer curve 1 * . With offer curves 1 * and 2 * , equilib- rium moves to point E ** . Now Nation 1’s terms of trade are higher and Nation 2’s are lower than under free trade, but the volume of trade is much smaller. At this point, Nation 2 is itself likely to retaliate, and in the end both nations may end up at the origin of Figure 8.7, repre- senting the autarky position for both nations. By so doing, all of the gains from trade are lost. Note that we have been implicitly discussing the optimum import tariff. More advanced treaties show, however, that an optimum import tariff is equivalent to an optimum export Salvatore c08.tex V2 - 11/15/2012 7:42 A.M. Page 241 Summary 241 E E* E** Y X 0 10 25 40 60 60 50 25 10 2* 2 1* 1 P W = 1 P W* = 0.625 FIGURE 8.7. The Optimum Tariff and Retaliation. Offer curves 1 and 2 define free trade equilibrium point E and P X / P Y = 1, as in Figure 8.6. If the optimum tariff for Nation 2 rotates its offer curve to 2 * , Nation 2’s terms of trade improve to P X /P Y = 1/P W = 1/0.625 = 1.6. At equilibrium point E * , Nation 2 is at its highest possible welfare and is better off than at the free trade equilibrium point E. However, since Nation 1’s welfare is reduced, it is likely to retaliate with an optimum tariff of its own, shown by offer curve 1 * and equilibrium at point E ** . Nation 2 may then itself retaliate so that in the end both nations are likely to lose all or most of the benefits from trade. tariff. Finally, note that the optimum tariff for a small country is zero, since a tariff will not affect its terms of trade and will only cause the volume of trade to decline (see points E and H in Figure 8.6). Thus, no tariff can increase the small nation’s welfare over its free trade position even if the trade partner does not retaliate. Finally, recent empirical research by Broda, Limao, and Weinstein (2008) indicates that nations do indeed impose higher tariffs on goods with lower export elasticity (i.e., in which the nations have more market power). S U M M A R Y 1. Although free trade maximizes world welfare, most nations impose some trade restrictions that benefit spe- cial groups in the nation. The most important type of trade restriction historically is the tariff. This is a tax or duty on imports or exports. The ad valorem tar- iff is expressed as a percentage of the value of the traded commodity, whereas the specific tariff is a fixed sum per unit. The two are sometimes combined into a compound tariff. The most common is the ad valorem import tariff. These have generally declined over the past 50 years and today average only about 3 percent on manufactured goods in industrial nations. 2. Partial equilibrium analysis of a tariff utilizes the nation’s demand and supply curves of the importable commodity and assumes that the domestic price of the importable commodity rises by the full amount of the tariff. It measures the reduction in domestic Salvatore c08.tex V2 - 11/15/2012 7:42 A.M. Page 242 242 Trade Restrictions: Tariffs consumption, increase in domestic production, reduc- tion in imports, the revenue collected, and redistribu- tion of income from domestic consumers (who pay a higher price for the commodity) to domestic producers (who receive a higher price) as a result of the tariff. A tariff leads to inefficiencies referred to as protection cost or deadweight loss. 3. The appropriate measure of the degree of protection actually provided to domestic producers is given by the rate of effective protection (g). This usually differs widely from the nominal tariff rate (t), and g can even be negative for a positive value of t . The two rates are equal only when the nominal rate on imported inputs equals the nominal rate on the final commodity or if there are no imported inputs. Rates of effective pro- tection in industrial nations are generally much higher than the corresponding nominal rates and are higher the more processed the product. These calculations, however, must be used cautiously because of their Download 7.1 Mb. Do'stlaringiz bilan baham: |
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