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 a primary tool for managing aggregate demand in the economy.

• Discretionary Fiscal Policy: Deliberate changes in government purchases or taxes to influence economic activity.

• Automatic Stabilizers: Government spending and taxes that automatically increase or decrease with the business cycle (e.g., unemployment insurance).

• State vs. Federal Policy: State-level fiscal actions are generally not aimed at national macroeconomic objectives.

• Example: During a recession, unemployment insurance payments rise automatically, helping to stabilize household incomes.

Federal Government Expenditures and Revenues

The composition and size of federal government expenditures and revenues have changed significantly over time, reflecting shifts in policy priorities and economic conditions.

• Expenditures: Include government purchases (defense, salaries, research), transfer payments (Social Security, Medicare), grants to state/local governments, and interest on debt.

• Revenues: Primarily from individual income taxes and payroll taxes; also from corporate taxes, excise taxes, tariffs, and other fees.

Challenges: Social Security and Medicare

Programs like Social Security and Medicare face long-term funding challenges due to an aging population and rising healthcare costs. Solutions may include increasing taxes, reducing benefits, tightening eligibility, or reducing 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. An increase in government purchases directly raises AD, while tax changes affect disposable income and thus consumption.

• Expansionary Fiscal Policy: Increases government purchases or decreases taxes to boost AD and reduce unemployment when real GDP is below potential.

• Contractionary Fiscal Policy: Decreases government purchases or increases taxes to reduce AD and control inflation when real GDP exceeds potential.

Fiscal Policy During Economic Shocks

During events like the Covid-19 pandemic, both aggregate supply and demand can be shocked. Expansionary fiscal policy can help restore GDP but may also contribute to inflation.

Fiscal Policy in the Dynamic Aggregate Demand and Aggregate Supply Model

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 Payments 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 change in GDP from a change in taxes; typically smaller in absolute value than the purchases multiplier.

• Transfer Payments Multiplier: Positive effect on GDP as increased transfers raise disposable income and consumption.

Formula for the Simple Government Purchases Multiplier:

where is the marginal propensity to consume.

Multiplier Effects 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

Implementation Challenges

• Legislative Delay: Time required for Congress to agree on fiscal actions.

• Implementation Delay: Time needed to execute 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

Key Definitions

• Budget Deficit: Government expenditures exceed tax revenues.

• Budget Surplus: Government expenditures are less than tax revenues.

• Federal Government Debt (National Debt): The total value of outstanding Treasury securities issued to finance past deficits.

Automatic Stabilizers and the Cyclically Adjusted Budget

Automatic stabilizers help limit the severity of recessions by increasing spending or reducing taxes without new legislation. The cyclically adjusted budget deficit/surplus estimates what the budget would be if the economy were at potential GDP.

Federal Government Debt: Trends and Ownership

The national debt rises during wars and recessions. It is financed by selling Treasury securities, which are held by government trust funds, the Federal Reserve, U.S. investors, and foreign entities.

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; a large wedge can reduce economic activity.

• Marginal Tax Rates: Higher marginal rates can discourage work, investment, and entrepreneurship.

• Tax Simplification: A simpler tax code can increase efficiency by reducing time and resources spent on tax avoidance and compliance.

Growth Rate of Real GDP:

Policy Implications

• Tax reforms can potentially increase long-run real GDP, but the magnitude depends on behavioral responses and the structure of the tax system.

• Government debt is less problematic if used to finance productive investments (infrastructure, education, R&D).