Business Conditions Analysis - Analytical Work
Business Conditions Analysis
ECON 736
Analytical Assignment #2 Professor Yamin Ahmad
Instructions: There are two questions in this Analytical Assignment. Each question is worth the same – 20 points. You should answer both. Please be concise in your answers. Answer ONLY what the question asks, as points are not awarded for verbosity! For short answer questions: You should limit your answers to each question to a single page. As a general hint for these types of questions, try to relate the context of the questions to any of the models that we have studied in lectures to try and maximize points. Where appropriate, use graphs and equations to help elucidate your answer! For questions that require calculations: Show your calculations, and not just the answer. You may use your lecture notes and the textbook. You may work independently or pair up with another student and submit the assignment jointly. Your submission must be put into the appropriate D2L dropbox by Thursday, September 28. If you are working with another student, only one of you should submit a final document for grading while the other should submit a dummy file to the dropbox so I can share feedback with them as well. In this case, make sure to have your names on both files.
Econ 736 Analytical Assignment #2
1
1. (20 pts) GDP and the AE/Keynesian Model:
Consider a small open economy in which aggregate expenditures, AE, is the sum of consumption spending by households, investment spending by firms, government expenditures and net exports. You may assume that net exports are independent of real GDP and taxes are lump‐sum. The numbers in the table below are in billions.
a. (4 pts) For the table below, calculate the missing values, A and B.
Real Government Net Aggregate
GDP Consumption Investment Expenditures Exports Taxes Expenditures
1,000 1,430 120 50 ‐100 160 A
2,000 B 120 50 ‐100 160 2,250
3,000 2,930 120 50 ‐100 160 3,000
4,000 3,680 120 50 ‐100 160 3,750
5,000 4,430 120 50 ‐100 160 4,500
b. (2 pts) From the table above, what kind of situation is the country in with regards to the trade balance (i.e. do we have a trade surplus or deficit)? What kind of situation is the country in with regards to the domestic balance (i.e. is the government running a deficit or surplus)?
c. (4 pts) Use the table above to calculate the slope of the AE curve. [Hint: Recall that the slope of the AE curve is the additional increase in aggregate expenditures arising from an increase in GDP.]
d. (4 pts) Recall that the Aggregate Expenditure function is written as:
0AE AE slope of AE Y
where AE0 is Autonomous Expenditures. Use the table in part (a) and your answer to part (c) above to calculate Autonomous Expenditure AE0. [Hint: Calculate induced expenditures for any given level of GDP, and use your answer to figure out AE0]
e. (2 pts) In the table above, what is the value of real GDP in equilibrium?
f. (4 pts) Suppose that the government decides to spend 500 billion more. By calculating the multiplier (or any other way), calculate the value of the new equilibrium value of real GDP!
Econ 736 Analytical Assignment #2
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2. (20 pts) The IS‐LM Model
Consider the following information about a hypothetical economy:
Goods Market:
12500 0.8 2000 100
2500; 3125
C Y T
I r
G T
Money Market:
17940000; 120
, 10000 2 100
M P
L r Y Y r
The real interest rate, r, above is in percent already (i.e. r = 10 means 10%).
a. (2 pts) Derive the IS relation.
b. (1 pts) Derive the LM relation.
c. (4 pts) Solve for the equilibrium real interest rate.
d. (4 pts) Solve for the equilibrium level of output.
e. (1 pts) Solve for the equilibrium values of C and I and verify that you obtained the value for Y by adding up the equilibrium values of C, I and G.
f. (4 pts) Now suppose that the money supply increases to 18, 204, 000M . Solve for the new values of Y, r, C and I in equilibrium and describe in words the effects of a monetary expansion.
g. (4 pts) Set M equal to its initial value of 17,940,000. Now suppose that government spending increases to 2830G . Once again, solve for the new values of Y, r, C and I in equilibrium and summarize the effects of the Fiscal expansion in words.