# Part A: Use the income identities to find what U.S. private business investment, I, was in Show your work.

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1 Exercise 1 Due: Preliminary figures (in billions of dollars) for 2004 taken from the 2005 Economic Report of the President showed that: Y = 11,728.0, C = 8,231.1, EX = 1,170.2, IM = 1,779.6, G = 2,183.8 and T = We can use the national income identities to describe the financing of U.S. business investment and the U.S. government deficit Part A: Use the income identities to find what U.S. private business investment, I, was in Show your work. Part B: Use the income identities to find what U.S. private savings, S, was in Show your work. Part C: Both U.S. private business investment and the U.S. government deficit need to be financed each year. What were the total financing needs of business and government in 2004? Part D: Was private savings sufficient to finance both private business investment and the government deficit? What was the shortfall? Where did U.S. firms and the U.S. government find the extra financing? Can you see the shortfall in the numbers provided at the outset (Hint: think about the current account)?

3 Exercise 2 Due: In the exercise, you will study two arbitrage conditions that show how financial markets determine exchange rates. I. CROSS RATE ARBITRAGE: E \$/ = E \$/ * E / A. Find recent quotes (Financial Times or use the internet 1 ) for the dollar rates for Euro and Yen, and also find the cross rate between Euro and Yen. Suppose you sell \$1 and buy Euros, then you sell the proceeds to buy Yen, and finally you sell the proceeds of that sale to buy back dollars. Do you end up with more or less than the \$1 you started out with? B. Economists would expect the rate of return in Part A to be quite small. Explain why? (Hint: think what would happen if there were a big return?) US Dollar JPN Yen INA Rupiah Figures for January 1 st of each year C. Use the above figures for Part C. 1. Suppose you are manager of an Indonesian company that borrowed the equivalent of US\$1,000,000 in Yen from a Japanese bank at the beginning of That amount is immediately converted into Rupiah for operations in your Indonesian factory. How much Rupiah do you now have for operations? 2. If you were to pay back the Japanese bank at the beginning of 1998, how much Rupiah does you company have to pay for the full principal borrowed in 1997? What about in 1999? And in 2000? 3. If you were manager of an Indonesian company that exported goods to America, how would these exchange rate movements have affected the dollar sales price of your goods? 2. INTEREST RATE ARBITRAGE: R \$ = R + (E e \$/ - E \$/ )/E \$/ A. Suppose the rate of return on a Eurobond is 4.3%, and suppose the dollar is expected to depreciate by 0.5%; what is the expected dollar rate of return on the Eurobond? B. Suppose the rate of return on a Eurobond is 4.3%, and suppose the Euro is expected to appreciate by 0.5%; what is the expected dollar rate of return on the Eurobond? C. Use the interest rate parity equation to calculate the spot exchange rate (E \$/ ) when R \$ = 0.045, R = 0.043, and E e \$/ = Is the resulting E \$/ greater or less than 1.094? D. Suppose R \$, R, and E e \$/ are at the values specified in Part C, but suppose that the spot exchange rate (E \$/ ) is initially equal to Describe the market forces that would drive the spot rate to the answer you found in Part C. 1 For example, you can use or

4 Exercise 2 ANSWERS In the exercise, you will study two arbitrage conditions that show how financial markets determine exchange rates. I. CROSS RATE ARBITRAGE: E \$/ = E \$/ * E / A. Find recent quotes (Financial Times or use the internet 2 ) for the dollar rates for Euro and Yen, and also find the cross rate between Euro and Yen. Suppose you sell \$1 and buy Euros, then you sell the proceeds to buy Yen, and finally you sell the proceeds of that sale to buy back dollars. Do you end up with more or less than the \$1 you started out with? On September 9, 2003: E \$/ = 1.12, E /\$ = , E / = E E E \$/ = (1/116.37) = \$ < \$1 B. Economists would expect the rate of return in Part A to be quite small. Explain why? (Hint: think what would happen if there were a big return?) If the loss were large, arbitragers would go the other way, making large profits. People would be buying (not selling) dollars. The dollar would appreciate, raising E /\$ and E /\$. This would make the return converge on US Dollar JPN Yen INA Rupiah Figures for January 1 st of each year C. Use the above figures for Part C. 1. Suppose you are manager of an Indonesian company that borrowed the equivalent of US\$1,000,000 in Yen from a Japanese bank at the beginning of That amount is immediately converted into Rupiah for operations in your Indonesian factory. How much Rupiah do you now have for operations? E E R/ = (2363/116.05) = 2,363,000,000R in If you were to pay back the Japanese bank at the beginning of 1998, how much Rupiah does you company have to pay for the full principal borrowed in 1997? What about in 1999? And in 2000? 2 For example, you can use or

5 E /\$ = = 116,050,000 Yen initially borrowed 1998: 116,050,000 E R/ = (5535/ ) = 4,917,787,008 R 1999: 116,050,000 (8005/113.3) = 8,199,296,117 R 2000: 116,050,000 (7050/102.31) = 7,996,798,944 R 3. If you were manager of an Indonesian company that exported goods to America, how would these exchange rate movements have affected the dollar sales price of your goods? From 1997 to 1999, the dollar is appreciating relative to the Rupiah, meaning the dollar sales price is decreasing (Indonesian goods are getting cheaper for Americans). In 2000, the Rupiah appreciated against the dollar from its 1999 level, making Indonesian goods more expensive in dollars than the year before- the dollar sales price went up. 2. INTEREST RATE ARBITRAGE: R \$ = R + (E e \$/ - E \$/ )/E \$/ A. Suppose the rate of return on a Eurobond is 4.3%, and suppose the dollar is expected to depreciate by 0.5%; what is the expected dollar rate of return on the Eurobond? R = 4.3% \$ depreciation = (E e \$/ - E \$/ )/E \$/ =.5% R \$ = = 4.8% dollar rate of return on the Eurobond B. Suppose the rate of return on a Eurobond is 4.3%, and suppose the Euro is expected to appreciate by 0.5%; what is the expected dollar rate of return on the Eurobond? R = 4.3% Euro appreciation = \$ depreciation =.5% R \$ = = 4.8% dollar rate of return on the Eurobond C. Use the interest rate parity equation to calculate the spot exchange rate (E \$/ ) when R \$ = 0.045, R = 0.043, and E e \$/ = Is the resulting E \$/ greater or less than 1.094? Interest rate parity equation: R \$ = R + (E e \$/ - E \$/ )/E \$/.045 = ( E \$/ )/E \$/.002 E \$/ = E \$/ E \$/ = the resulting E \$/ is less than D. Suppose R \$, R, and E e \$/ are at the values specified in Part C, but suppose that the spot exchange rate (E \$/ ) is initially equal to Describe the market forces that would drive the spot rate to the answer you found in Part C.

6 If the spot rate starts at 1.094, the left side of the interest rate parity eqn is greater than the right, meaning there is a greater return on dollar bonds than Eurobonds. People would dump Euros and buy dollars, leading to an appreciation of the dollar relative to the Euro, and driving the spot rate back to that found in part C.

7 Exercise 3 Due: The financial markets diagram shows how the money market and the bonds market simultaneously determine equilibrium E and R. In this exercise, you will get practice using it. I. Suppose the European Central Bank (ECB) raises its interest rate (R*) in an attempt to establish an anti-inflation reputation similar to the Bundesbank's. A. Use the financial markets diagram to show what this would do to the US interest rate (R) and exchange rate (E) assuming the FED did not change the US money supply. Explain intuitively why the exchange rate moves the direction it does? (Hint: what happens to the supplies and demands for home and foreign bonds?) What would all of this do to the price of US imports from Europe? B. Suppose the FED wanted to avoid these price level consequences in the US. Use the financial markets diagram to show what the FED would have to do to its money supply (M) to maintain the original exchange rate. C. Is there any way that the FED could simultaneously maintain its original exchange rate and its original interest rate? Justify your answer. II. As Europe comes out of its present recession, it will import more from the US, and this will expand US output (Y). A. Use the diagram to show what this will do to the US interest rate (R) and exchange rate (E). Explain intuitively why the interest rate and the exchange rate move in the directions they do. (Hint: again, what happens to supplies and demands?) B. Is there any way that the FED could change its money supply so as to simultaneously maintain its original exchange rate and its original interest rate? Use the diagram to justify your answer.

8 Exercise 3 ANSWERS The financial markets diagram shows how the money market and the bonds market simultaneously determine equilibrium E and R. In this exercise, you will get practice using it. I. Suppose the European Central Bank (ECB) raises its interest rate (R*) in an attempt to establish an anti-inflation reputation similar to the Bundesbank's. A. Use the financial markets diagram to show what this would do to the US interest rate (R) and exchange rate (E) assuming the FED did not change the US money supply. Explain intuitively why the exchange rate moves the direction it does? (Hint: what happens to the supplies and demands for home and foreign bonds?) What would all of this do to the price of US imports from Europe? If the FED does not change M, then neither the supply nor the demand for M is affected, and R is unchanged. R*8 6 ED for Euro-bonds 6 people move out of \$ and into Euro 6 \$ depreciates. This depreciation raises the price of imports, since it now takes more \$ to meet a given price quoted in Euro. B. Suppose the FED wanted to avoid these price level consequences in the US. Use the financial markets diagram to show what the FED would have to do to its money supply (M) to maintain the original exchange rate. The FED has to lower M enough to make R rise as much as R* did. Then, E remains at E1.

9 C. Is there any way that the FED could simultaneously maintain its original exchange rate and its original interest rate? Justify your answer. No. If the Fed changes M, then R must move to re-establish equilibrium in the money market. If the FED does not change M, then E must move, for reasons given in part A. II. As Europe comes out of its present recession, it will import more from the US, and this will expand US output (Y). A. Use the diagram to show what this will do to the US interest rate (R) and exchange rate (E). Explain intuitively why the interest rate and the exchange rate move in the directions they do. (Hint: again, what happens to supplies and demands?) Y8 6 L()8 6 money demand curve shifts down. ED for money 6 R8 to clear the money market. R8 6 ED for \$-bonds 6 people try to get out of Euro and into \$ assets 6 \$ depreciates. B. Is there any way that the FED could change its money supply so as to simultaneously maintain its original exchange rate and its original interest rate? Use the diagram to justify your answer. Yes. FED has to increase money supply enough to accommodate the new money demand at the original R1. If R1 is maintained, then the E1 will also be maintained. This is possible here because the interest parity curve has not shifted.

10 Exercise 4 Due: The AA-DD diagram illustrates the short run equilibrium in financial markets and in the goods market. In this exercise, you will get practice using it. I. Suppose the economy is initially at full employment, Y fe. Then, a stock market crash (such as the one we had in 1987 or 1998) makes firms curtail some of their investment projects (since they become harder to finance). Use the AA-DD diagram to show how this could cause a recession. Part A: Do the AA-DD curve analysis; be sure to explain why you shift any curve. Part B: Tell the story of what is happening in the goods market, and how it spills over to the financial markets. Part C: Show the path of adjustment to the new short run equilibrium. Is there any exchange rate overshooting? II. Now suppose the FED takes steps to offset the recession. Part A: Begin with an AA-DD diagram that shows where you ended up in question I; then show what the FED would have to do to restore the original level of output, Y fe. Once again, be sure to explain why you shift any curve. Part B: Tell the story of what is happening in the financial markets, and how it spills over to the goods market; show the path of adjustment to the new short run equilibrium. Is there any exchange rate overshooting in this case? Part C: Y has been restored to Y fe, but E has not been restored to its initial level, E 1. Why didn't it go back to its initial level; that is, why was a depreciation necessary? III. Suppose now that the FED wanted to simultaneously offset the recession and appreciate the exchange rate (for lower prices) to some E 3 < E 1 ; suppose further that it could persuade Congress to help in the effort. Part A: Begin with an AA-DD diagram that shows where you ended up in question I, and then show how a combined monetary and fiscal policy could restore both the initial level of output, Y fe, and the exchange rate E 3. Part B: Could either monetary or fiscal policy have achieved this alone?

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