ECO100Y5 Chapter Notes - Chapter 21: Real Interest Rate, Opportunity Cost, National Income And Product Accounts

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21. 1 desired aggregate expenditure desired aggregate expenditure (ae) The sum of desired or planned spanning on domestic output by households, firms, governments, and foreigners. Ae = c + i + g + x. National income accounts measure actual expenditures in each of the four expenditure categories. Desired consumption expenditure saving all disposable income that is not spent on consumption. By definition, there are only two possible uses of disposable income - consumption and saving. In the simplest case, the relationship between desired consumption expenditure and disposable income: disposable income, wealth, interest rates, expectations about the future. The change in desired consumption divided by the change in disposable income that brought it about. The slope of the consumption function. marginal propensity to consume = slope= c/ y: positive: increase in disposable income lead to increases in desired consumption expenditure, constant slope: mpc is the same at any level of disposable income.

Related Questions

The following is a model of a closed economy with nogovernment.
C = 44 + 0.6YD I = 12

where C = desired consumption expenditure (in billions of $), YD =disposable
income (in billions of $), and I = desired investment expenditure(in billions
of $).

a) What is autonomous C equal to?
b) What is induced C equal to if national income (Y) is 120?
c) What would happen to C if Y increased by 10?
d) What is the saving function equal to?
e) How can private saving (S) be negative? Explain.
f) What would happen to S if Y increased by 10?
g) At what level of Y is the average propensity to consume (APC)equal to 1?
h) How does the APC change as Y increases?
i) How does the average propensity to save (APS) change as Yincreases?
j) What is aggregate expenditure function equal to?
k) Is the economy in equilibrium when Y is 150? If no, then by howmuch are
the economyâs inventories changing?
l) What are the equilibrium levels of Y, C, S, and YD?
m) At equilibrium, what do the injections and the withdrawals inthis
economy equal?
n) Give two reasons why investment would change from I = 12 to I =18.
o) What are the new equilibrium levels of Y, C, S, and YD ifinvestment
changed from I = 12 to I = 18?
p) What is the size of the (simple) multiplier?
q) What is the change in Y in the 3rd round of the multipliereffect as a
result of the change in investment in part n?

harlequinseal728

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 lumpâsum. The numbers in the table below are in billions.

Real GDP	Consumption	Investment	Gov't Expend.	Net Exports	Taxes	Aggregate Expenditures
1000	1430	120	50	-100	160	A
2000	B	120	50	-100	160	2250
3000	2930	120	50	-100	160	3000
4000	3680	120	50	-100	160	3750
5000	4430	120	50	-100	160	4500

a. (4 pts) For the table below, calculate the missing values, A and B. 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: AE = AE0 + (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!

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

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

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

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

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

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

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

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

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

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*

ECO100Y5 Chapter Notes - Chapter 21: Real Interest Rate, Opportunity Cost, National Income And Product Accounts

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