BackChapter 16: Fiscal Policy – Macroeconomics Study Notes
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Fiscal Policy: Concepts and Applications
What Is Fiscal Policy?
Fiscal policy refers to the use of federal government spending, transfer payments, and taxation to achieve macroeconomic objectives such as full employment, price stability, and economic growth. It is distinct from state and local government actions, which are generally not aimed at national-level objectives.
Automatic stabilizers: Government spending and taxes that automatically increase or decrease with the business cycle (e.g., unemployment insurance).
Discretionary fiscal policy: Deliberate changes in government spending or taxes to influence the economy.
Example: During recessions, unemployment insurance payments rise automatically, helping to stabilize incomes.
Federal Government Expenditures and Revenue
The composition of federal government spending and revenue sources has evolved over time, with a significant portion now allocated to transfer payments and funded primarily through individual income and payroll taxes.
Federal purchases: Defense, salaries of federal employees, national parks, scientific research.
Transfer payments: Social Security, Medicare, unemployment insurance (about half of expenditures).
Other expenditures: Grants to state/local governments, interest on federal debt.
Revenue sources: Individual income taxes, payroll taxes, corporate taxes, excise taxes, tariffs, and other fees.
Social Security and Medicare: Fiscal Challenges
Programs like Social Security and Medicare have reduced poverty among the elderly but face long-term funding challenges due to an aging population and rising healthcare costs.
Projected shortfall: Estimated at $16.8 trillion through 2092 (present value).
Potential solutions: Increase taxes, decrease benefits, raise eligibility age, reduce medical costs.
The Effects of Fiscal Policy on Real GDP and the Price Level
Fiscal Policy and Aggregate Demand
Fiscal policy influences aggregate demand (AD) through changes in government purchases and taxes. Government purchases directly affect AD, while tax changes influence disposable income and thus consumption.
Expansionary fiscal policy: Increases government purchases or decreases taxes to boost AD and reduce unemployment.
Contractionary fiscal policy: Decreases government purchases or increases taxes to reduce AD and control inflation.
Fiscal Policy During Economic Shocks
During the Covid-19 pandemic, both aggregate supply and demand shifted left, prompting large expansionary fiscal policy to restore GDP, but at the cost of higher inflation.
Fiscal Policy in the Dynamic Aggregate Demand and Aggregate Supply Model
Dynamic Model Analysis
The dynamic AD-AS model incorporates changes in potential GDP and the price level over time, providing a more realistic framework for analyzing fiscal policy effects.
Expansionary policy: Used when projected AD growth is insufficient for full employment; raises both real GDP and the price level.
Contractionary policy: Used when projected AD growth is excessive; reduces inflationary pressures.
The Government Purchases, Tax, and Transfer Payment Multipliers
The Multiplier Effect
The multiplier effect describes how an initial change in autonomous expenditure (such as government purchases) leads to a larger change in real GDP due to induced increases in consumption.
Government purchases multiplier: Measures the total change in GDP from a change in government spending.
Tax multiplier: Measures the total change in GDP from a change in taxes (negative value; smaller in absolute terms than the purchases multiplier).
Transfer payments multiplier: Positive effect on GDP as increased transfers raise disposable income and consumption.
Multiplier Formulas
Government purchases multiplier:
Tax multiplier:
Balanced budget multiplier: Always equals 1 in the short run (if government purchases and taxes increase by the same amount, GDP rises by that amount).
Example: If , then the government purchases multiplier is 4, and the tax multiplier is -3.
Multiplier and Aggregate Supply
Because the short-run aggregate supply (SRAS) curve is upward sloping, increases in AD raise both real GDP and the price level.
Limits to Using Fiscal Policy to Stabilize the Economy
Challenges in Fiscal Policy Implementation
Legislative delay: Time required for Congress to agree on actions.
Implementation delay: Time required to begin large spending projects.
Crowding out: Increased government spending may reduce private investment, consumption, and net exports by raising interest rates.
Deficits, Surpluses, and Federal Government Debt
Budget Deficits and Surpluses
Budget deficit: Government expenditures exceed tax revenue.
Budget surplus: Government expenditures are less than tax revenue.
Automatic stabilizers: Deficits often increase during recessions due to falling tax receipts and rising transfer payments.
Federal Government Debt
National debt: Total value of outstanding Treasury securities.
Debt increases: During wars, recessions, and periods of large deficits.
Ownership of the National Debt
About 40% is held by the government itself (trust funds, Federal Reserve).
Another 40% is held by U.S. banks and investors.
About 23% is held by foreign entities.
Is Government Debt a Problem?
Currently, the U.S. government faces low risk of default due to low borrowing costs and manageable interest payments.
Long-term risks include crowding out of investment if debt grows faster than GDP.
Debt used for productive investment (infrastructure, education, R&D) is less problematic.
Long-Run Fiscal Policy and Economic Growth
Supply-Side Economics
Long-run fiscal policy aims to increase potential GDP by influencing aggregate supply, often through tax policy changes that affect incentives to work, save, invest, and start businesses.
Tax wedge: The difference between pretax and posttax returns to economic activity; larger wedges reduce incentives and lower GDP.
Marginal tax rates: Affect labor supply, entrepreneurship, investment, and saving decisions.
Tax simplification: Reducing complexity increases efficiency and reduces compliance costs.
Explaining Long-Run Increases in Real GDP
Growth rate of real GDP = Growth rate of hours worked + Growth rate of labor productivity
Most future GDP growth is expected to come from productivity improvements rather than increases in hours worked.
Appendix: A Closer Look at the Multiplier
Multiplier Formulas and Extensions
Government purchases multiplier:
Tax multiplier:
Balanced budget multiplier: Always equals 1 in the short run.
With tax rates: Lower tax rates increase the size of the multiplier.
Open economy: The multiplier is smaller when some spending goes to imports (marginal propensity to import, MPI).
Example: If , , and , the government purchases multiplier is smaller than in a closed economy.
Summary Table: Key Fiscal Policy Multipliers
Multiplier | Formula | Significance |
|---|---|---|
Government Purchases Multiplier | Measures total GDP change from government spending | |
Tax Multiplier | Measures total GDP change from tax changes | |
Balanced Budget Multiplier | 1 | GDP change when spending and taxes rise equally |
