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MIT 14 02 - Study Guide

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114.02 Principles of Macroeconomics Problem Set # 2, Questions Posted on Thursday, September 19, 2002, due on Thursday, September 26, 2002 You must staple a copy of this frontpage on your problem set. Remember to write down your TAs section name and recitation time, your name and MIT ID. Name: __________________________________________________ MIT ID: __________________________________________________ TA: __________________________________________________ (Table is for corrector use only) 1 2 3 4 5 Total Part I Part II (1-5) Part II (6-10) Part II (11-15) Grand Total2Part I: True, False Questions. Decide whether each statement is true or false and justify your answer with a short argument. (5 points each, 25 points total) 1. If taxes are set proportional to income, T = tY , and t > 0, then the multiplier is larger. 2. A fiscal contraction must decrease consumption, output and investment. 3. A monetary expansion coupled with a fiscal expansion causes both output and the interest rate to raise for sure. 4. The introduction of ATMs could have positive effect on the GDP. 5. The Fed can off-set a fiscal expansion by open market transactions. Part II. National Accounts. (5 points each, 75 points total) Consider the following Good Market model in a closed economy, where we modify the linear form of the consumption and investment: (1) Wc r c - Yc c C32d 1 0++= (2) r b - Yb b I2 1 0+= (3) B W+=M Where: Y- GDP, C- consumption, G- government spending, Y d – disposal income, r- interest rate, W- net wealth, I- investment, B- bonds. Assume Taxes = tY + T. 1. Interpret the parameters in the equations above. 2. What are the endogenous and exogenous variables in the above model? 3. Solve for the equilibrium output in the goods market. Represent equilibrium in the Z-Y space. 4. Plot and show the slope of the IS curve in the r-Y space. 5. How does the slope depend on the parameters? Give an economic interpretation. 6. What is the effect on output and consumption of a fiscal expansion financed by a similar increase in the per capita taxes: ∆G=∆T. Does the budget deficit BD=G-Taxes, change in any particular way?37. What is the effect on output and consumption of a fiscal expansion financed by borrowing from the domestic public: ∆G=∆B. Does the budget deficit BD=G-Taxes, change in any particular way? Now assume that the money demand and supply are the following (here P=1): (4) Wm r m - Ym m M32 10d ++= (5) dsMM= 8. What is the equilibrium condition? Represent equilibrium in the r-M space. 9. Interpret the parameters in equation (4). 10. Plot and show the slope of the LM curve in the r-Y space. 11. How does the slope depend on 1m ? on 2m ? Give an economic interpretation. 12. Solve for both the LM and IS equation and find the equilibrium output. Now assume that the economy opens to international trade. Assume that exports are exogenous (X=X) and imports (Im) behave according to the following equation. (6) Yvv10Im+= 13. Interpret equation (6). Has anything changed regarding exogenous and endogenous variables? 14. Draw NX=X-Im in the NX-Y space. 15. Also discuss what happens to the slope of the IS relative to the closed economy case of question II.4This document was created with Win2PDF available at http://www.daneprairie.com.The unregistered version of Win2PDF is for evaluation or non-commercial use


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MIT 14 02 - Study Guide

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