《国际经济学》(双语)试卷1参考答案

《国际经济学》（双语）试卷1参考答案
Ⅰ. Explain the following terms (30 points, 3 points/term)
parative advantage:A country has a comparative advantage in producing a good if the opportunity cost of producing that good in terms of other goods is lower in that country than it is in other countries(3 points).
2.Specific factors model: It assumes an economy that produces two goods and the labor is a mobile factor that can move between sectors, other factors are assumed to be specific, that is, they can be used only in the production of particular goods(3 points).
3．Heckscher-Ohlin theory: it is also referred to as the factor-proportions theory, the theory emphasizes the interplay between the proportions in which different factors of production are available in different countries and the proportions in which they are used in producing different goods(3 points).
4.Leontief paradox: the United States would be an exporter of capital-intensive goods and an importer of labor-intensive goods. Surprisingly, however, this was not the case, the economist Leontief found that U.S. exports were less capital-intensive than U.S. imports. This result is known as the Leontief paradox. It is the single biggest piece of evidence against the factor-proportions theory(3 points).
5.Official international reserves: Official international reserves are foreign assets held by central banks as a cushion against national economic misfortune. At one time official reserves consisted largely of gold, but today central banks' reserves include substantial foreign financial assets, particularly U.S. dollar assets such as Treasury bills(3 points).
6.The official settlements balance: the official settlements balance or the balance of payments. This balance is the sum of the current account balance, the capital account balance, the nonreserve portion of the financial account balance, and the statistical discrepancy, and it indicates the payments gap that official reserve transactions need to cover(3 points).
7.Foreign exchange option: A foreign exchange option gives its owner the right to buy or sell a specified amount of foreign currency at a specified price at any time up to a specified expiration date. The other party to the deal, the option's seller, is required to sell or buy the foreign currency at the discretion of the option's owner, who is under no obligation to exercise his right(3 points).
8.Interest parity condition: The condition that the expected returns on deposits of any twocurrencies are equal when measured in the same currency is called the interest
parity condition. It implies that potential holders of foreign currency deposits view them all as equally desirable assets.
9.Fisher effect: This long-run relationship between inflation and interest rates is called the Fisher effect. Fisher effect tells us that all else equal, a rise in a country's expected inflation rate will eventually cause an equal rise in the interest rate that deposits of its currency offer. Similarly, a fall in the expected inflation rate will eventually cause a fall in the interest rate(3 points).
10.Long run analysis: The long run analysis of an economic event allows for the complete adjustment of the price level (which may take a long time) and for full employment of all factors of production(3 points).
II. Single-Choice Questions（15 points, 1.5points/Question）
1. b
2. d
3. c
4. a
5. b
6. a
7. d
8. a
9. c 10. a
Ⅲ.Questions and problems（40 points, 8 points/Question）
1.What are the three types of international transaction recorded in the balance of payments(8 points)?
Answer: the three types of international transactions are current account, financial account and capital account(3 points). Transactions that involve the export or import of goods or services and therefore enter directly into the current account. Transactions that involve the purchase or sale of financial assets. An asset is any one of the forms in which wealth can be held, such as money, stocks, factories, or government debt. The financial account of the balance of payments records all international purchases or sales of financial assets. Certain other activities resulting in transfers of wealth between countries are recorded in the capital account(5 points).
2. In the United States where land is cheap, the ratio of land to labor used in cattle rising is higher than that of land used in wheat growing. But in more crowded countries, where land is expensive and labor is cheap, it is common to raise cows by using less land and more labor than Americans use to grow wheat. Can we still say that raising cattle is land intensive compared with farming wheat? Why or why not(8 points)?
Answer: The definition of cattle growing as land intensive depends on the ratio of land to labor used in production, not on the ratio of land or labor to output(3 points). The ratio of land to labor in cattle exceeds the ratio in wheat in the United States, implying cattle is land intensive in the United States. Cattle is land intensive in other countries too if the ratio of land to labor in cattle production exceeds the ratio in wheat production in that country. The comparison between another country and the United States is less relevant for answering the question(5 points).
3. Suppose the dollar interest rate and the pound sterling interest rate are the same, 5 percent per year. What is the relation between the current equilibrium $/£ exchange rate and its expected future level? Suppose the expected future $/£ exchange rate, $1.52 per pound, remains constant as Britain's interest rate rises to 10 percent per year. If the U.S. interest rate also remains constant, what is the new equilibrium
$/£ exchange rate(8 points)?
Answer: The current equilibrium exchange rate must equal its expected future level since, with equality of nominal interest rates, there can be no expected increase or decrease in the dollar/pound exchange rate in equilibrium(3 points). If the expected exchange rate remains at $1.52 per pound and the pound interest rate rises to 10 percent, then interest parity is satisfied only if the current exchange rate changes such that there is an expected appreciation of the dollar equal to 5 percent. This will occur when the exchange rate rises to $1.60 per pound (a depreciation of the dollar against the pound) (5 points).
4. What are the real exchange rate and nominal exchange rate, and their differences(8 points)?
Answer: the real exchange rate is the relative price of two output baskets, nominal exchange rate is the relative price of two currencies(3 points).The real exchange rate between two countries' currencies is a broad summary measure of the prices of one country's goods and services relative to the other's. the prediction of PPP is that real exchange rates never change, at least not permanently. Real exchange rates are defined, however, in terms of nominal exchange rates and price levels(5 points).
5:Give a example to explain foreign exchange swap(8 points).
Answer: foreign exchange swap is a spot sale of a currency combined with a forward repurchase of the currency(3 points). For example, a multinational company has just received $1 million from sales and knows it will have to pay those dollars to a California supplier in three months. The company's asset-management department would meanwhile like to invest the $1 million in Swiss francs. A three-month swap of dollars into Swiss francs may result in lower brokers' fees than the two separate transactions of selling dollars for spot Swiss francs and selling the Swiss francs for dollars on the forward market(5 points).
Ⅳ.An economy can produce good 1 using labor and capital and good 2 using labor and land. The total supply of labor is 100 units.The marginal product of labor production are
70 0.69 0.49 80
0.66 0.46 90
0.63 0.43 100
0.60 0.40
Questions: a. Suppose that the price of good 2 relative to that of good 1 is 2. Determine graphically the wage rate and the allocation of labor between the two sectors (5 points).
b. Suppose that the relative price of good 2 falls to 1. Determine the wage rate and the allocation of labor between the two sectors (5 points).
c. Calculate the effects of the price change on the income of the specific factors in sectors 1 and 2(5 points).
Answer: a. With the assumption that labor is freely mobile between sectors, it will move from the low-wage sector to the high-wage sector until wages are equalized. So in equilibrium, the wage rate is equal to the value of labor ’s marginal product.
2/122211=⨯=⨯P P P MPL P MPL
The abscissa of point of intersection illustrated above should be at L1=30. The labor allocation between the sectors is L1=30 and L2=70. The wage rate is 0.98(5 points). b. The relative decline in the price of good 2 caused labor to be reallocated: labor is drawn out of production of good 2 and enters production of good 1 (Ｌ1=60, L2=40). And the wage rate is equal to 0.74(5 points).
c. With the relative price change from P2/P1=2 to P2/P1=1, the price of good 2 has fallen by 50 percent, while the price of good 1 has stayed the same. Wages have fallen too, but by less than the fall in P2 (wages fell approximately 25 percent). Thus, the real wage relative to P2 actually rises while real wage relative to P1 falls. Hence, to determine the welfare consequence for workers, the information about their consumption shares of good 1 and good 2 is needed(5 points).。