ECO 1102 Lecture Notes - Lecture 22: Aggregate Demand, Automatic Stabilizer, Money Supply

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10 Dec 2016

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Chapter 15: part 2 influence of monetary and. Multiplier effect applies to any event that alters spending on any component of gdp: consumption, investment, government purchases, net exports. Marginal propensity to consume (mpc): fraction of extra income that a household consumes rather than saves. Change in gvt purchases = billion. 1st change in consumption = mpc x billion. 2nd change in consumption = mpc2 x billion. 3rd change in consumption = mpc3 x billion, etc. Total change in demand = (1 + mpc + mpc2 + mpc3 + ) x billion. Multiplier = 1 + mpc + mpc2 + mpc3 + . In open economy: multiplier = 1/ (1 mpc + mpi) Crowding-out effect on investment: offset in ad that results when expansionary fiscal policy raises the interest rate and thereby reduces investment spending. Because this appreciation of the dollar causes net exports to fall, there is an additional.

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In the country of Utopia, the structure of the economy is described as the following:

Y = C + I + G + (X â M)

C = C0 + (mpc)(DI)

I = I0 + (mpi)(Y)

M = M0 + (mpm)(DI)

DI = Y â T

T = (t)(Y)

Where Y is the level of real GDP in the economy, DI denotes the disposable income in the economy, C represents the level of consumption in the economy, C0 is the autonomous consumption level, mpc denotes the marginal propensity to consume, I is the level of investment in the economy, I0 characterizes the autonomous investment, mpi is the marginal propensity to invest, G characterizes the level of government expenditure, X is the level of export from the country, M represents the amount of import in the country, M0 is the level of autonomous import, mpm denotes the marginal propensity to import, T is the amount of tax imposed in the country, and t represents the average tax rate in the economy.

After extensive research, the economists in Utopia believe that the following values (all the dollar values are in number of millions) can be assigned to the structure of the economy, C0 = $500; mpc = 0.8; I0 = $200; mpi = 0.2; G = $400; X = $300; M0 = $100; mpm = 0.1; and t = 0.25. The Utopian economists further believe that the level of potential GDP in the country is $4,000.

Questions:

1. What is the demand side equilibrium level of real GDP in the country? Please show your calculations.

2. Is the overall Utopian economy in equilibrium? Elaborate your answer.

3. If the economy is not in equilibrium, what will happen eventually? Explain your answer.

4. What is the value of the overall multiplier? Please show your calculations and explain the value.

The country of Utopia is probably experiencing a recessionary pressure in its economy now. The economists are suspecting that, since the latest estimates of mpc, mpi, and mpm indicate that their estimated values have gone down to 0.65, 0.15, and 0.05 respectively.

5. What is the demand side equilibrium level of real GDP in the country now? Please show your calculations.

6. Is the overall Utopian economy now in equilibrium? Elaborate your answer.

7. If the economy is not in equilibrium now, what will happen eventually? Explain your answer.

8. What is the adjusted value of the overall multiplier? Please show your calculations and explain the value.

1. The multiplier helps explain

A. why a decrease in taxes causes real Gross Domestic Product (GDP) to fall by more than the amount of the decrease in taxes.

B. why a fall in investment cause real Gross Domestic Product (GDP) to rise by more than the amount of the decrease in investment.

C. why a rise in government expenditures causes real Gross Domestic Product (GDP) to rise by more than the amount of the increase in government spending.

D. why an increase in disposable income causes real Gross Domestic Product (GDP) to rise by less than the amount of the increase in disposable income.

2. If the marginal propensity to save (MPS) increases, the multiplier

A. decreases.

B. can either increase or decrease, depending on what happens to the marginal propensity to consume (MPC).

C. stays the same.

D. increases.

QUESTION 60

The investment function will shift when there is a change in

		A. the opportunity cost of retained earnings.
		B. firms' profit expectations.
		C. the cost of borrowing.
		D. the interest rate.

1.43 points

QUESTION 61

In the Keynesian model, whenever planned saving exceeds planned investment,

		A. there will be unplanned inventory accumulation.
		B. real GDP will not be influenced.
		C. the interest rate will remain unchanged.
		D. there will be unplanned inventory depletion.

1.43 points

QUESTION 62

In the Keynesian model, whenever planned saving is less than planned investment,

		A. there will be unplanned inventory depletion.
		B. the interest rate will remain unchanged.
		C. there will be unplanned inventory accumulation.
		D. real GDP will not be influenced.

1.43 points

QUESTION 63

Government purchases

		A. are determined by the political process.
		B. are determined by the public.
		C. are influenced by interest rates.
		D. are determined by suppliers.

1.43 points

QUESTION 64

If, at some level of output, total planned real expenditures are less than real Gross Domestic Product (GDP),

		A. real GDP will either fall or remain unchanged, depending on the MPC.
		B. real GDP will rise.
		C. real GDP remains unchanged.
		D. unplanned inventories will increase and real GDP will fall.

1.43 points

QUESTION 65

When the economy is operating at the equilibrium level of GDP, we know that

		A. total planned real expenditures equal real GDP.
		B. real net exports equal inventory changes.
		C. planned real investment spending equals real net exports of zero.
		D. total planned real consumption expenditures equal real GDP.

1.43 points

QUESTION 66

One divided by the marginal propensity to save (MPS) is the formula for

		A. the inverse of the multiplier.
		B. the multiplier.
		C. one minus the multiplier.
		D. autonomous consumption.

QUESTION 67

Thinking like an economist would, which is true of investment?

		A. Investment represents spending on capital goods.
		B. Investment is a stock concept.
		C. Investment is putting money into stocks and bonds.
		D. It is the portion of disposable income that is not used for consumption or saving.

QUESTION 68

Other things being equal, if input prices rise in a country, then there would be

		A. cost-push inflation.
		B. demand-pull inflation.
		C. cost-pull deflation.
		D. more production and a lower price level.

QUESTION 69

In the short run, if the price level rises, then the overall economy can temporarily produce beyond its nominal capacity. One reason for this is that

		A. existing capital equipment can be used more intensively.
		B. wage rates rise almost simultaneously with the price level.
		C. the unemployment rate usually rises dramatically along with the price level.
		D. workers can be switched from counted to uncounted production.

fuchsiaclam197

Consider an economy in which taxes, planned investment, government spending on goods and services, and net exports are autonomous, but consumption and planned investment change as the interest rate changes. You are given the following information concerning autonomous consumption, the marginal propensity to consume, planned investment, government purchases of goods and services, and net exports:

Ca = 1,500 - 10r c = 0.6 Ip = 2,400 - 50r G = 2,000 T = 1,800 NX = -200

a. Compute the value of the marginal propensity to save.

b. Compute the amount of autonomous planned spending, Ap, given that the interest rate equals 5.

c. Compute the equilibrium level of income, given that the interest rate equals 5.

d. Suppose that autonomous consumption changes by 4 percent of any change in household wealth and that the decline in the housing market in 2006-07 and drop in the stock market in the summer of 2007 reduces household wealth by $750 billion. Compute the decrease in autonomous consumption that results from the decline in household wealth.

e. Calculate the new amount of autonomous planned spending, Ap, and the new equilibrium level of income, given that the interest rate equals 5.

f. Using your answers to parts c-e, compute the value of the multiplier.

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ECO 1102 Lecture Notes - Lecture 22: Aggregate Demand, Automatic Stabilizer, Money Supply

ECO 1102 Full Course Notes

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