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ECON 402 Lecture Notes - Lecture 10: Keynesian Cross, Aggregate Demand, Aggregate Supply

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Verified Note
goldfox765
13 Feb 2019
School
U of M
Department
Economics
Course
ECON 402
Professor
Maciej Dudek

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9

ECON 402 Lecture 9: Chapter 8.2

10

ECON 402 Lecture Notes - Lecture 10: Keynesian Cross, Aggregate Demand, Aggregate Supply

12

ECON 402 Lecture Notes - Lecture 12: Keynesian Cross, Loanable Funds, Liquidity Preference

Document Summary

The model of aggregate demand and aggregate supply. Long run: price flexible, output determined by factors of production and technology, unemployment equals nature rate. Short run: price fixed, output determined by agg demand, employment negatively related to output. Simple closed-economy model, income is determined by expenditure. Notation: i = planned investment, pe = c+i+g = expenditure, real gdp = y = actual expenditure, unplanned inventory investment = difference between actual and planned expenditure. Elements of the keynesian cross: consumption function: c = c(y-t, govt policy : g =g t = t, planned investment: i = i, planned expenditure: pe = c(y-t) + i + g, equilibrium condition: Is curve is negative: fall in interest rate- > increase investment spending -> increase planned spending, to restore equilibrium -> output must increase. Lm curve is upward sloping: an increase in income -> raise money demand, excess demand in the market at the initial interest rate, to restore equilibrium -> interest must increase.

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Related Questions

a) In the AD-AS model, stagflation does not persist, because the working of the self-correcting mechanism of the economy _____ the level of output and _____ the price level until the economy eventually returns to a long-run equilibrium state, where actual output _____ potential output.
decreases; decreases; falls short of
increases; decreases; equals
decreases; increases; exceeds
decreases; increases; equals
increases; decreases; exceeds
b) The LRAS curve is drawn as a vertical line at potential output (Y*) to indicate that
Y* is independent of the price level and that actual output Y > Y* in the long run
Y* equals actual output (Y) in the long run
Y* is independent of the price level and that actual output Y = Y* in the long run
Y* is independent of the price level
Y* is independent of the price level and that actual output Y < Y* in the long run
c) Stagflation arises in the context of the AD-AS model when some external factor causes
the LRAS curve to shift to the right
the AD curve to shift leftwards
the SRAS curve to shift downwards
the SRAS curve to shift upwards
the AD curve to shift rightwards
d) If the SRAS curve is positively sloped, then a decrease in the demand for Canadian-made goods in Europe will lead to _____ in the price level, in the short run.
either an increase or a decrease
no change
an increase
a decrease
an initial increase, and then a decrease
e) Which of the following will shift the aggregate demand curve to the right?
Consumers become pessimistic about the future
A new technology is developed that will increase profits
Income taxes are raised
Foreign economies fall into recession, reducing their demand for domestic exports
The government reduces purchases to balance the budget
f) Suppose a stock market crash decreases the stock of household wealth and therefore causes autonomous consumption to fall. Which of the following is the likely result?
A leftward shift the AD curve
There will be no movement of the AD curve
A movement down the AD curve
A movement up the AD curve
A rightward of the shift the AD curve
g) An economy is characterized by the AD equation P = 200 ? 0.02Y, SRAS equation P = 100 and LRAS equation Y* = 5000. In the absence of any change in policy or exogenous shocks, this economy will achieve a long-run price level of
100
110
120
90
105
h) The AD-AS model depicts a self-correcting economy. This means that the price level in the model adjusts automatically in response to a(n) _____ gap, so as to eliminate the _____ gap in the long run, without requiring any help from government policies.
recessionary; recessionary
recessionary; expansionary
expansionary; expansionary
output; output
expansionary; recessionary
i) The aggregate demand curve shows
the amount of planned aggregate expenditure (and output) at the current price level
the amount of planned aggregate expenditure (and output) at an average price level
the amount of planned aggregate expenditure (and output) at a constant price level
the amount of planned aggregate expenditure (and output) at various price levels
the amount of planned aggregate expenditure (and output) at last year's price level
j) Consider an economy initially at long-run equilibrium with output (Y) equal to potential output (Y*). If the SRAS is positively sloped, then a shift to the right of the AD curve will lead to _____ in the price level, in the short run. In the long run, the SRAS curve will shift to the _____ and the equilibrium will be at __________.
an increase; left; Y = Y*
a decrease; right; Y > Y*
an increase; right; Y = Y*
a decrease; left; Y > Y*
no change; left; Y = Y*

An economy with zero net exports is described below:

C = 100 + 0.6 (Y 'T)
I p = 70
G = 120
NX = 0
T = 150
The multiplier in this economy is 2.5.
 

A. Find short-run equilibrium output.

Instruction: Enter your response as an integer value.

Short-run equilibrium output: .

B. Economic recovery abroad increases the demand for the country's exports; as a result, NX rises to 80.

Instruction: Enter your response as an integer value.

Short-run equilibrium output (Click to select)decreases/ increases to ________ .

C. Assume that foreign economies are slowing, reducing the demand for the country's exports so that NX = -80. (A negative value of net exports means that exports are less than imports.)

Instruction: Enter your response as an integer value.

Short-run equilibrium output (Click to select)increases/decreases to ___________ .

D. Which of the following best describes the tendency of recessions and expansions to spread across countries?

1. Lower planned aggregate spending in one nation will reduce the amount of goods it exports abroad, thereby lowering the value of imports for its trading partners, which will reduce its short-term equilibrium output as well.

2. Lower planned aggregate spending abroad means that fewer goods will be exported from a specific nation, leaving more goods available for domestic consumption (C) in that nation, which will increase its short-term equilibrium output.

3. Lower planned aggregate spending abroad will reduce the amount of investment that flows into domestic industries from other countries, thereby reducing domestic short-term equilibrium output.

4. Lower planned aggregate spending in a nation means fewer imports of foreign goods, thereby reducing the short-term equilibrium output of its trading partners through lower net export (NX) values in those nations.

 

The Modified Keynesian Model

Y = C + I + G + X – IM … equilibrium condition in a 4-sector model where:

C = 150 + 0.9DI … consumption function

I = 50 … autonomous investment

G = 100 … autonomous government spending

X = 200 … autonomous exports

IM = 100 … autonomous imports

And also:

DI = Y – T + Tr T = 0 … autonomous taxes

Tr = 0 … autonomous transfer payments

YF = 5000 … full-employment Y

1. Solve for the equilibrium level of real output/income (Y*) in this economy.

2. Given the model above, net exports equal $________. Does this represent a trade deficit or trade surplus?

3. Given the model above, the federal budget has a (deficit/surplus) equal to $________.

4. What is the value of the MPC? … the value of the MPS?

5. Calculate the “oversimplified” expenditure multiplier.

6. Suppose that full-employment (YF) equals $5000. Is there a recessionary or inflationary output gap?

7. (Refer to question “6”.) How much is the gap equal to?

8. Suppose the government chooses to eliminate the gap by using expansionary fiscal policy (i.e., increasing G). Given the numbers above, by how much would government spending (G) need to increase to achieve the goal of full-employment?

9. Suppose instead that the government decided to lower taxes to eliminate the output gap in question “6”. How much would taxes need to fall to achieve the goal of full-employment?

10. Which action (raising G or lowering T) has the largest effect on the federal budget deficit and the national debt?

11. Suppose the national debt equaled $6000 before the tax cut (refer to question “9”). What would be the value of the national debt after this policy action?