Quiz 9: Demand-Side Equilibrium: Unemployment or Inflation

Business

For about 30 years now, imports have consistently exceeded exports in the U.S. economy. Many people consider this imbalance to be a major problem. Does this chapter give you any hints about why (You may want to discuss this issue with your instructor. You will learn more about it in later chapters.)

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If the imports of an economy consistently exceed the exports of an economy, then the net exports will be negative. Negative net exports will push down the equilibrium level of GDP Based on the discussion in the chapter, increase in net exports will have a multiplier effect on GDP. It means a small increase in net exports will cause an increase in GDP at a higher rate. On the other hand, a small fall in net exports will cause the GDP to fall at a higher rate. Thereby, the multiplier effect of negative net exports will push the equilibrium level of GDP down.

Q 2

From the following data, construct an expenditure schedule on a piece of graph paper. Then use the income-expenditure (45° line) diagram to determine the equilibrium level of GDP. Now suppose investment spending rises to $260, and the price level is fixed. By how much will equilibrium GDP increase Derive the answer both numerically and graphically.

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Using the information given in Table (2), the following graph is drawn to derive the equilibrium level of GDP. Figure - 1 In Figure (1), GDP is measured on horizontal axis and consumption expenditure is measured on vertical axis. The plotted line of GDP and consumption expenditure combination intersects the 45-degree line at e₁ where both GDP and domestic expenditure are at $3,800. Hence, the equilibrium level of GDP is $3,800. Since the investment increased to $260, the consumption expenditure has changed. The consumption expenditure can be written as follows: ……(2) Table (3) shows the consumption expenditure schedule. Table - 3 After increasing the investment level, the equilibrium level of GDP and consumption expenditure is changed. The new equilibrium level of GDP and consumption expenditure is plotted in Figure (2). Figure - 2 In Figure (2), GDP is measured on horizontal axis and consumer expenditure is measured on vertical axis. Increase in investment level shifts the consumption expenditure from to . Hence, the new equilibrium point is obtained at , where consumption expenditure is equal to the level of GDP, and it intersects the 45-degree line. The $20 (from $240 to $260) increase in investment increases the equilibrium level of GDP to $200 ($3,800 to $4,000).

Q 3

Look back at the income-expenditure diagram in Figure 3 and explain why some level of real GDP other than $6,000 (say, $5,000 or $7,000) is not an equilibrium on the demand side of the economy. Do not give a mechanical answer to this question. Explain the economic mechanism involved.

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The equilibrium level of GDP is $6,000. If the real GDP is greater than or less than the equilibrium level, the following problem will occur. If real GDP is below equilibrium level If the level of GDP falls to $5,000, then the actual GDP will be less than the planned GDP. When the actual GDP is less than the planned GDP, it will increase the recessionary gap. It implies that the actual GDP is below the potential level. If real GDP is above equilibrium level If the level of GDP increases to $7,000, then the actual GDP will be higher than the planned GDP. When the actual GDP is greater than the planned GDP, it will increase the inflationary pressure. It implies that the actual GDP is higher than the potential level.

Q 4

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Q 5

Does the economy this year seem to have an inflationary gap or a recessionary gap (If you do not know the answer from reading the newspaper, ask your instructor.)

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Q 6

Suppose that investment spending is always $250, government purchases are $100, net exports are always $50, and consumer spending depends on the price level in the following way: On a piece of graph paper, use these data to construct an aggregate demand curve. Why do you think this example supposes that consumption declines as the price level rises

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Q 7

Try to remember where you last spent a dollar. Explain how this dollar will lead to a multiplier chain of increased income and spending. (Who received the dollar What will he or she do with it )

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Q 8

(More difficult) 9 Consider an economy in which the consumption function takes the following simple algebraic form: C = 300 + 0.75 DI and in which investment ( I ) is always $900 and net exports are always -$100. Government purchases are fixed at $1,300 and axes are fixed at $1,200. Find the equilibrium level of GDP, and then compare your answer to Table₁ and Figure 2. ( Hint: Remember that disposable income is GDP minus taxes: DI = Y - T = Y - 1,200.)

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Q 9

(More difficult) Keep everything the same as in Test Yourself Question 4 except change investment to I = $1,100. Use the equilibrium condition Y = C + I + G + ( X - IM ) to find the equilibrium level of GDP on the demand side. (In working out the answer, assume the price level is fixed.) Compare your answer to Table 3 and Figure₁0. Now compare your answer to the answer to Test Yourself Question 4. What do you learn about the multiplier Table 3 Figure₁0 Reference Test Yourself Question 4. (More difficult) 9 Consider an economy in which the consumption function takes the following simple algebraic form: C = 300 + 0.75 DI and in which investment ( I ) is always $900 and net exports are always -$100. Government purchases are fixed at $1,300 and axes are fixed at $1,200. Find the equilibrium level of GDP, and then compare your answer to Table₁ and Figure 2. ( Hint: Remember that disposable income is GDP minus taxes: DI = Y - T = Y - 1,200.)

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Q 10

(More difficult) An economy has the following consumption function: C = 200 + 0.8 DI The government budget is balanced, with government purchases and taxes both fixed at $1,000. Net exports are $100. Investment is $600. Find equilibrium GDP. What is the multiplier for this economy If G rises by $100, what happens to Y What happens to Y if both G and T rise by $100 at the same time

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Q 11

Use both numerical and graphical methods to find the multiplier effect of the following shift in the consumption function in an economy in which investment is always $220, government purchases are always $100, and net exports are always -$40. (Hint: What is the marginal propensity to consume )

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Q 12

Explain the basic logic behind the multiplier in words. Why does it require b, the marginal propensity to consume, to be between 0 anD₁

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Q 13

Find the equilibrium level of GDP demanded in an economy in which investment is always $300, net exports are always -$50, the government budget is balanced with purchases and taxes both equal to $400, and the consumption function is described by the following algebraic equation: C = 150 + 0.75 DI ( Hint: Do not forget that DI = Y - T. )

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Q 14

(More difficult) What would happen to the multiplier analysis if b = 0 If b = 1

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Q 15

Referring to Test Yourself Question 1, do the same for an economy in which investment is $250, net exports are zero, government purchases and taxes are both $400, and the consumption function is as follows: C = 250 + 0.5 DI Reference Test Yourself Question 1, Find the equilibrium level of GDP demanded in an economy in which investment is always $300, net exports are always -$50, the government budget is balanced with purchases and taxes both equal to $400, and the consumption function is described by the following algebraic equation: C = 150 + 0.75 DI ( Hint: Do not forget that DI = Y - T. )

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Q 16

In each of these cases, how much saving is there in equilibrium ( Hint: Income not consumed must be saved.) Is saving equal to investment

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Q 17

Imagine an economy in which consumer expenditure is represented by the following equation: C = 50 + 0.75 DI Imagine also that investors want to spend $500 at every level of income ( I = $500), net exports are zero ( X - IM = 0), government purchases are $300, and taxes are $200. a. What is the equilibrium level of GDP b. If potential GDP is $3,000, is there a recessionary or inflationary gap If so, how much c. What will happen to the equilibrium level of GDP if investors become optimistic about the country's future and raise their investment to $600 d. After investment has increased to $600, is there a recessionary or inflationary gap How much

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Q 18

Fredonia has the following consumption function: C = 100 + 0.8 DI Firms in Fredonia always invest $700 and net exports are zero, initially. The government budget is balanced with spending and taxes both equal to $500. a. Find the equilibrium level of GDP. b. How much is saved Is saving equal to investment c. Now suppose that an export-promotion drive succeeds in raising net exports to $100. Answer (a) and (b) under these new circumstances.

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Q 19

Suppose exports and imports of a country are given by the following: Calculate net exports at each level of GDP.

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Q 20

If domestic expenditure (the sum of C + I + G in the economy described in Test Yourself Question 1) is as shown in the following table, construct a 45° line diagram and locate the equilibrium level of GDP.

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Q 21

Now raise exports to $650 and find the equilibrium again. How large is the multiplier

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Quiz 9: Demand-Side Equilibrium: Unemployment or Inflation

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