Government agricultural credit policy and macroeconomic fundamentals
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Transcript of 1 of 42 PART V The Core of Macroeconomic Theory © 2012 Pearson Education CHAPTER OUTLINE 24 The...
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CHAPTER OUTLINE
24The Government and Fiscal Policy
Government in the EconomyGovernment Purchases (G), Net Taxes (T), and Disposable Income (Yd)
The Determination of Equilibrium Output (Income)
Fiscal Policy at Work: Multiplier EffectsThe Government Spending MultiplierThe Tax MultiplierThe Balanced-Budget Multiplier
The Federal BudgetThe Budget in 2009Fiscal Policy Since 1993: The Clinton, Bush, and Obama AdministrationsThe Federal Government Debt
The Economy’s Influence on the Government Budget
Automatic Stabilizers and DestabilizersFull-Employment Budget
Looking Ahead
Appendix A: Deriving the Fiscal Policy Multipliers
Appendix B: The Case in Which Tax Revenues Depend on Income
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fiscal policy The government’s spending and taxing policies.
monetary policy The behavior of the Central Bank concerning the nation’s money supply.
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discretionary fiscal policy Changes in taxes or spending that are the result of deliberate changes in government policy.
net taxes (T) Taxes paid by firms and households to the government minus transfer payments made to households by the government.
disposable, or after-tax, income (Yd) Total income minus net taxes: Y − T.
disposable income ≡ total income − net taxes
Yd ≡ Y − T
Government in the Economy
Government Purchases (G), Net Taxes (T), and Disposable Income (Yd)
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FIGURE 24.1 Adding Net Taxes (T) and Government Purchases (G) to the Circular Flow of Income
Government in the Economy
Government Purchases (G), Net Taxes (T), and Disposable Income (Yd)
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The disposable income (Yd) of households must end up as either consumption (C) or saving (S). Thus,
Y C Sd
Y T C S
Y C S T
Government in the Economy
Government Purchases (G), Net Taxes (T), and Disposable Income (Yd)
Because disposable income is aggregate income (Y) minus net taxes (T), we can write another identity:
By adding T to both sides:
Planned aggregate expenditure (AE) is the sum of consumption spending by households (C), planned investment by business firms (I), and government purchases of goods and services (G).
GICAE
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budget deficit The difference between what a government spends and what it collects in taxes in a given period: G − T.
budget deficit ≡ G − T
Government in the Economy
Government Purchases (G), Net Taxes (T), and Disposable Income (Yd)
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To modify our aggregate consumption function to incorporate disposable income instead of before-tax income, instead of C = a + bY, we write
C = a + bYd
or
C = a + b(Y − T)
Our consumption function now has consumption depending on disposable income instead of before-tax income.
Government in the Economy
Government Purchases (G), Net Taxes (T), and Disposable Income (Yd)
Adding Taxes to the Consumption Function
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The government can affect investment behavior through its tax treatment of depreciation and other tax policies.
Government in the Economy
Government Purchases (G), Net Taxes (T), and Disposable Income (Yd)
Planned Investment
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Y = C + I + G
TABLE 24.1 Finding Equilibrium for I = 100, G = 100, and T = 100
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Output(Income)
Y
NetTaxes
T
DisposableIncomeYd ≡Y T
ConsumptionSpending
C = 100 + .75 Yd
SavingS
Yd – C
PlannedInvestmentSpending
I
GovernmentPurchases
G
PlannedAggregate
Expenditure C + I + G
UnplannedInventoryChange
Y (C + I + G)
Adjustmentto Disequi-
librium
300 100 200 250 50 100 100 450 150 Output ↑
500 100 400 400 0 100 100 600 100 Output ↑
700 100 600 550 50 100 100 750 50 Output ↑
900 100 800 700 100 100 100 900 0 Equilibrium
1,100 100 1,000 850 150 100 100 1,050 + 50 Output ↓
1,300 100 1,200 1,000 200 100 100 1,200 + 100 Output ↓
1,500 100 1,400 1,150 250 100 100 1,350 + 150 Output ↓
Government in the Economy
The Determination of Equilibrium Output (Income)
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FIGURE 24.2 Finding Equilibrium Output/Income Graphically
Because G and I are both fixed at 100, the aggregate expenditure function is the new consumption function displaced upward by I + G = 200.Equilibrium occurs at Y = C + I + G = 900.
Government in the Economy
The Determination of Equilibrium Output (Income)
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saving/investment approach to equilibrium:
S + T = I + G
To derive this, we know that in equilibrium, aggregate output (income) (Y) equals planned aggregate expenditure (AE). By definition, AE equals C + I + G, and by definition, Y equals C + S + T.Therefore, at equilibrium:
C + S + T = C + I + G
Subtracting C from both sides leaves:
S + T = I + G
Government in the Economy
The Determination of Equilibrium Output (Income)
The Saving/Investment Approach to Equilibrium
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At this point, we are assuming that the government controls G and T. In this section, we will review three multipliers:
Government spending multiplier
Tax multiplier
Balanced-budget multiplier
Fiscal Policy at Work: Multiplier Effects
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1government spending multiplier
MPS
government spending multiplier The ratio of the change in the equilibrium level of output to a change in government spending.
Fiscal Policy at Work: Multiplier Effects
The Government Spending Multiplier
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TABLE 24.2 Finding Equilibrium after a Government Spending Increase of 50 (G Has Increased from 100 in Table 9.1 to 150 Here)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Output(Income)
Y
NetTaxes
T
DisposableIncomeYd ≡Y T
ConsumptionSpending
C = 100 + .75 Yd
SavingS
Yd – C
PlannedInvestmentSpending
I
GovernmentPurchases
G
PlannedAggregate
Expenditure C + I + G
UnplannedInventoryChange
Y (C + I + G)
Adjustmentto
Disequilibrium
300 100 200 250 50 100 150 500 200 Output ↑
500 100 400 400 0 100 150 650 150 Output ↑
700 100 600 550 50 100 150 800 100 Output ↑
900 100 800 700 100 100 150 950 50 Output ↑
1,100 100 1,000 850 150 100 150 1,100 0 Equilibrium
1,300 100 1,200 1,000 200 100 150 1,250 + 50 Output ↓
Fiscal Policy at Work: Multiplier Effects
The Government Spending Multiplier
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FIGURE 24.3 The GovernmentSpending MultiplierIncreasing government spending by 50 shifts the AE function up by 50. As Y rises in response, additional consumption is generated.Overall, the equilibrium level of Y increases by 200, from 900 to 1,100.
Fiscal Policy at Work: Multiplier Effects
The Government Spending Multiplier
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tax multiplier The ratio of change in the equilibrium level of output to a change in taxes.
tax multiplier MPC
MPS
YM P S
( in itia l in c rease in ag g reg a te ex p en d itu re )
1
1( )
MPCY T MPC T
MPS MPS
Fiscal Policy at Work: Multiplier Effects
The Tax Multiplier
Because the initial change in aggregate expenditure caused by a tax change of ∆T is (−∆T × MPC), we can solve for the tax multiplier by substitution:
Because a tax cut will cause an increase in consumption expenditures and output and a tax increase will cause a reduction in consumption expenditures and output, the tax multiplier is a negative multiplier:
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balanced-budget multiplier The ratio of change in the equilibrium level of output to a change in government spending where the change in government spending is balanced by a change in taxes so as not to create any deficit. The balanced-budget multiplier is equal to 1: The change in Y resulting from the change in G and the equal change in T are exactly the same size as the initial change in G or T.
1balanced-budget multiplier
Fiscal Policy at Work: Multiplier Effects
The Balanced-Budget Multiplier
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TABLE 24.3 Finding Equilibrium after a Balanced-Budget Increase in G and T of 200 Each (Both G and T Have Increased from 100 in Table 9.1 to 300 Here)
(1) (2) (3) (4) (5) (6) (7) (8) (9)
Output(Income)
Y
NetTaxes
T
DisposableIncomeYd ≡Y T
ConsumptionSpending
C = 100 + .75 Yd
PlannedInvestmentSpending
I
GovernmentPurchases
G
PlannedAggregate
Expenditure C + I + G
UnplannedInventoryChange
Y (C + I + G)
Adjustmentto
Disequilibrium
500 300 200 250 100 300 650 150 Output ↑
700 300 400 400 100 300 800 100 Output ↑
900 300 600 550 100 300 950 50 Output ↑
1,100 300 800 700 100 300 1,100 0 Equilibrium
1,300 300 1,000 850 100 300 1,250 + 50 Output ↓
1,500 300 1,200 1,000 100 300 1,400 + 100 Output ↓
Fiscal Policy at Work: Multiplier Effects
The Balanced-Budget Multiplier
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TABLE 24.4 Summary of Fiscal Policy Multipliers
Policy Stimulus MultiplierFinal Impact onEquilibrium Y
Government spendingmultiplier
Increase or decrease in thelevel of governmentpurchases: ∆G
Tax multiplier Increase or decrease in thelevel of net taxes: ∆T
Balanced-budgetmultiplier
Simultaneous balanced-budgetincrease or decrease in thelevel of government purchasesand net taxes: ∆G = ∆T
1
1
M P S
M P C
M P S
1 G
MPS
MPC
TMPS
G
Fiscal Policy at Work: Multiplier Effects
The Balanced-Budget Multiplier
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Fiscal Policy at Work: Multiplier Effects
The Balanced-Budget Multiplier
A Warning
Although we have added government, the story told about the multiplier is still incomplete and oversimplified.
We have been treating net taxes (T) as a lump-sum, fixed amount, whereas in practice, taxes depend on income.
Appendix B to this chapter shows that the size of the multiplier is reduced when we make the more realistic assumption that taxes depend on income.
We continue to add more realism and difficulty to our analysis in the chapters that follow.
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federal budget The budget of the federal government.
The “budget” is really three different budgets:
It is a political document that dispenses favors to certain groups or regions and places burdens on others.
It is a reflection of goals the government wants to achieve.
The budget may be an embodiment of some beliefs about how (if at all) the government should manage the macroeconomy.
The Federal Budget
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federal surplus (+) or deficit (−) Federal government receipts minus expenditures.
The Federal Budget
The Budget in 2009
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federal debt The total amount owed by the federal government.
privately held federal debt The privately held (non-government-owned) debt of the U.S. government.
The Federal Budget
The Federal Government Debt
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automatic stabilizers Revenue and expenditure items in the federal budget that automatically change with the state of the economy in such a way as to stabilize GDP.
fiscal drag The negative effect on the economy that occurs when average tax rates increase because taxpayers have moved into higher income brackets during an expansion.
The Economy’s Influence on the Government Budget
Automatic Stabilizers and Destabilizers
automatic destabilizer Revenue and expenditure items in the federal budget that automatically change with the state of the economy in such a way as to destabilize GDP.
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full-employment budget What the federal budget would be if the economy were producing at the full-employment level of output.
structural deficit The deficit that remains at full employment.
cyclical deficit The deficit that occurs because of a downturn in the business cycle.
The Economy’s Influence on the Government Budget
Full-Employment Budget
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automatic destabilizers
automatic stabilizers
balanced-budget multiplier
budget deficit
cyclical deficit
discretionary fiscal policy
disposable, or after-tax, income (Yd)
federal budget
federal debt
federal surplus (+) or deficit (−)
fiscal drag
fiscal policy
full-employment budget
government spending multiplier
monetary policy
net taxes (T)
privately held federal debt
structural deficit
tax multiplier
1. Disposable income Yd ≡ Y − T
2. AE ≡ C + I + G
3. Government budget deficit ≡ G − T
4. Equilibrium in an economy with a government: Y = C + I + G
5. Saving/investment approach to equilibrium in an economy with a government: S + T = I + G
6. Government spending multiplier ≡
7. Tax multiplier ≡
8. Balanced-budget multiplier ≡ 1
MPC
MPS
MPS
1
R E V I E W T E R M S A N D C O N C E P T S
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Y C I G
C a b Y T ( )
Y a b Y T I G ( )Y a bY bT I G
Y bY a I G bT Y b a I G bT( )1
)(1
1bTGIa
b Y
CHAPTER 24 APPENDIX A
Deriving the Fiscal Policy Multipliers
The Government Spending and Tax Multipliers
We can derive the multiplier algebraically using our hypothetical consumption function:
The equilibrium condition is
By substituting for C, we get
This equation can be rearranged to yield
Now solve for Y by dividing through by (1 − b):
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It is easy to show formally that the balanced-budget multiplier = 1.
Gincrease in spending:( )C T MPC − decrease in spending:( )G T MPC = net increase in spending
In a balanced-budget increase, G = T; so we can substitute:
net initial increase in spending:
G − G (MPC) = G (1 − MPC)
CHAPTER 24 APPENDIX A
Deriving the Fiscal Policy Multipliers
The Balanced-Budget Multiplier
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1( )Y G MPS G
MPS
Because MPS = (1 − MPC), the net initial increase in spending is:
G (MPS)
We can now apply the expenditure multiplier to this net initial increase in spending:
MPS
1
CHAPTER 24 APPENDIX A
Deriving the Fiscal Policy Multipliers
The Balanced-Budget Multiplier
Thus, the final total increase in the equilibrium level of Y is just equal to the initial balanced increase in G and T.
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TYYd
)3/1200( YYYd
YYYd 3/1200
dYC 75.100
)3/1200(75.100 YYC
FIGURE 24B.1 The Tax Function
CHAPTER 24 APPENDIX B
The Case in Which Tax Revenues Depend on Income
This graph shows net taxes (taxes minus transfer payments) as a function of aggregate income.
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When taxes are strictly lump-sum (T = 100) and do not depend on income, the aggregate expenditure function is steeper than when taxes depend on income.
FIGURE 24B.2 Different Tax Systems
GICY
100 .75( 200 1/3 ) 100 100Y Y YI GC
4505.
5.450
1001002515075.100
Y
YY
YYY
CHAPTER 24 APPENDIX B
The Case in Which Tax Revenues Depend on Income
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C a b Y T ( )
0C a bY bT btY
0( )C a b Y T tY
0Y a bY bT btY I G
C
Yb b t
a I G bT
1
1 0( )
CHAPTER 24 APPENDIX B
The Government Spending and Tax Multipliers Algebraically
The Case in Which Tax Revenues Depend on Incomes
Through substitution we get
Solving for Y:
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1
1 b bt
CHAPTER 24 APPENDIX B
The Government Spending and Tax Multipliers Algebraically
The Case in Which Tax Revenues Depend on Incomes
This means that a $1 increase in G or I (holding a and T0 constant) will increase the equilibrium level of Y by
Holding a, I, and G constant, a fixed or lump-sum tax cut (a cut in T0) will increase the equilibrium level of income by
btb
b
1