Fiscal Policy and Its Macroeconomic Effects

Fiscal Policy and Economic Growth

Introduction to Fiscal Policy

Fiscal policy is a central tool in macroeconomics, used by governments to influence the overall economy through changes in government spending, transfer payments, and taxation. It plays a crucial role in stabilizing the economy during recessions and controlling inflation during expansions.

• Fiscal policy: Changes in federal government purchases, transfer payments, and taxes to achieve macroeconomic objectives (such as stable prices, high employment, and economic growth).

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

• Discretionary fiscal policy: Intentional actions by the government to change spending or taxes, often in response to economic conditions.

Federal Government Expenditures and Revenues

Trends in Government Spending

Government spending as a share of the economy has changed significantly over time, especially during major events such as wars and recessions.

• Before the 1930s, most government spending was at the state or local level. Now, the federal government accounts for two-thirds to three-quarters of total government expenditures.

• Federal expenditures as a percentage of GDP are now over 30%, but a smaller share is spent on direct purchases of goods and services.

Composition of Expenditures and Revenues (2022)

• Purchases: Defense spending and other federal activities (e.g., salaries of FBI agents, national parks, scientific research).

• Transfer payments: About half of federal expenditures go to Social Security, Medicare, and unemployment insurance.

• Revenues: Most come from individual income taxes and payroll taxes; corporate income taxes and other sources (excise taxes, tariffs) make up the rest.

Social Security and Medicare: Long-Term Challenges

Fiscal Sustainability

Social Security and Medicare have reduced poverty among the elderly, but face long-term funding challenges due to demographic changes and rising health care costs.

• The projected budget shortfall for these programs through 2092 is nearly $16.8 trillion (present value).

• Potential solutions include increasing taxes, decreasing benefits, raising eligibility ages, and reducing medical costs.

The Effects of Fiscal Policy on Real GDP and the Price Level

Mechanisms of Fiscal Policy

Fiscal policy affects the economy through changes in aggregate demand:

• Government purchases directly increase aggregate demand.

• Tax changes affect disposable income, which influences consumption and thus aggregate demand indirectly.

Types of Fiscal Policy

• Expansionary fiscal policy: Increasing government purchases or decreasing taxes to boost real GDP when it is below potential GDP (reduces unemployment).

• Contractionary fiscal policy: Decreasing government purchases or increasing taxes to reduce real GDP when it is above potential GDP (controls inflation).

Aggregate Demand and Supply Shocks

Major events, such as the Covid-19 pandemic, can cause both aggregate supply and demand shocks, requiring large-scale fiscal interventions to restore economic stability.

Countercyclical Fiscal Policy

Policy Actions and Outcomes

Problem	Type of Policy Required	Actions by Congress and the President	Result
Recession	Expansionary	Increase government purchases or cut taxes	Real GDP and price level rise
Rising inflation	Contractionary	Decrease government purchases or raise taxes	Real GDP and price level fall

Note: These effects assume ceteris paribus (all else equal), including monetary policy.

Dynamic Aggregate Demand and Aggregate Supply Model

Static vs. Dynamic Models

• Static models assume constant potential GDP and price level.

• Dynamic models account for changes in potential GDP and price level over time, providing a more realistic view of fiscal policy effects.

Expansionary and Contractionary Policy in the Dynamic Model

• Expansionary policy increases aggregate demand, raising both real GDP and the price level.

• Contractionary policy decreases aggregate demand, ideally returning the economy to full employment and controlling inflation.

The Multiplier Effect

Government Purchases, Tax, and Transfer Payments Multipliers

The multiplier effect describes how an initial change in autonomous expenditure leads to a larger change in real GDP.

• Autonomous increase: Direct increase in aggregate demand from government spending.

• Induced increase: Additional consumption spending resulting from higher incomes.

• Multiplier effect: The process by which a change in autonomous expenditure leads to a larger change in real GDP.

Formulas:

• Government purchases multiplier: $\text{Government purchases multiplier} = \frac{\text{Change in equilibrium real GDP}}{\text{Change in government purchases}}$

• Tax multiplier: $\text{Tax multiplier} = \frac{\text{Change in equilibrium real GDP}}{\text{Change in taxes}}$

• Transfer payments multiplier: $\text{Transfer payments multiplier} = \frac{\text{Change in equilibrium real GDP}}{\text{Change in transfer payments}}$

The tax multiplier is negative (an increase in taxes decreases real GDP), and is smaller in absolute value than the government purchases multiplier.

Example: Multiplier Effect of Government Purchases

Period	Additional Spending This Period	Cumulative Increase in Spending and Real GDP
1	$100 billion in government purchases	$100 billion
2	$50 billion in consumption spending	$150 billion
3	$25 billion in consumption spending	$175 billion
4	$12.5 billion in consumption spending	$187.5 billion
...	...	...
∞	—	$200 billion

Additional info: This example assumes each round of spending induces half as much additional consumption as the previous round.

Transfer Payments and Tax Rate Effects

• Transfer payments increase household disposable income, leading to higher consumption and a positive multiplier effect.

• Decreases in tax rates increase disposable income and the size of the multiplier effect, as more income is available for spending.

Aggregate Supply and the Multiplier

• An increase in aggregate demand raises both real GDP and the price level, as the short-run aggregate supply curve is upward sloping.

• The actual increase in real GDP is smaller than the total shift in aggregate demand due to the upward-sloping supply curve.

Limits to Fiscal Policy

Challenges in Implementation

• Timing issues: Legislative and implementation delays can reduce the effectiveness of fiscal policy.

• Crowding out: Increased government spending may reduce private investment, consumption, and net exports by raising interest rates.

Short-Run vs. Long-Run Effects of Crowding Out

• In the short run, increased government purchases may be partially offset by reduced private spending.

• In the long run, the increase in government purchases has no effect on real GDP, as the economy returns to potential GDP. The main effect is a larger government sector.

Fiscal Policy During the Great Recession

Severity of the 2007–2009 Recession

Duration	Decline in Real GDP	Peak Unemployment Rate
Average for postwar recessions	-1.7%	7.6%
Recession of 2007–2009	-4.0%	10.0%

Recessions following financial crises are especially severe, as shown by international studies.

Fiscal Policy Response: The Stimulus Package

• 2008: Congress authorized a $95 billion tax rebate to boost current incomes.

• 2009: The American Recovery and Reinvestment Act (ARRA) was enacted, totaling $840 billion (largest fiscal policy action in U.S. history), with two-thirds in spending increases and the rest in tax cuts and credits.

• Most tax cut effects occurred quickly (2009–2011), while spending increases peaked in 2010 and continued through 2013.

Effectiveness of the Stimulus

• Measuring the effect is difficult due to other factors affecting GDP and employment.

• The Congressional Budget Office (CBO) estimated that the stimulus reduced the severity of the recession but did not fully restore full employment.

Year	Change in Real GDP (%)	Change in Unemployment Rate (pp)	Change in Employment (millions)
2009	0.4 to 1.8	-0.1 to -0.5	0.3 to 1.3
2010	0.7 to 4.1	-0.4 to -1.1	0.9 to 3.7
2011	0.4 to 2.6	-0.2 to -1.4	0.6 to 3.6
2012	0.2 to 1.5	-0.1 to -0.6	0.2 to 1.3
2013	0.0 to 0.8	0.0 to -0.2	0.0 to 0.3
2014	0.0 to 0.2	0.0 to 0.2	0.0 to 0.1

Estimating Multipliers

Variation in Estimates

Economists provide a range of estimates for the size of government purchases and tax multipliers, depending on the context and methodology.

Economists	Type of Multiplier	Size of Multiplier
Congressional Budget Office	Government purchases	0.5–2.5
Valerie Ramey (UCSD)	Military expenditure	0.6–1.1
Christina Romer & David Romer (Berkeley)	Tax	2–3
Robert Barro (Harvard) & Charles Redlick (Bain Capital)	Tax	1.1

Additional info: Multipliers are difficult to estimate because many factors affect aggregate demand and supply simultaneously.

Deficits, Surpluses, and Federal Government Debt

Definitions

• Budget deficit: Government expenditures exceed tax revenue.

• Budget surplus: Government expenditures are less than tax revenue.

Trends and Automatic Stabilizers

• The U.S. federal government usually runs a deficit, especially during recessions and wartime.

• Automatic stabilizers (e.g., increased transfer payments during recessions) help limit the severity of downturns.

Cyclically Adjusted Budget Deficit

• Measures the deficit or surplus if the economy were at potential GDP, removing the effects of the business cycle.

• In 2009, the CBO estimated the cyclically adjusted deficit at 7.6% of GDP, with the remainder due to automatic stabilizers.

Should the Federal Budget Be Balanced?

• Many economists argue for balancing the budget at potential GDP, not during recessions, to avoid worsening downturns.

• Some suggest the government should borrow for long-term investments, similar to households and firms.

Federal Government Debt

Ownership and Risks

• About 40% of the national debt is held by the government itself; the rest is held by the public, including foreign investors.

• Currently, the risk of default is low due to low interest rates and manageable interest payments.

• Long-term risks include potential crowding out of private investment if debt grows too large.

Long-Run Fiscal Policy and Economic Growth

Supply-Side Economics

• Some fiscal policies aim to increase potential GDP by improving incentives to work, save, invest, and start businesses.

• These are often called supply-side policies and focus on aggregate supply rather than demand.

Determinants of Long-Run Growth

• Growth in hours worked and labor productivity (real GDP per hour worked) are key drivers of long-run real GDP growth.

• Formula: $\text{Real GDP} = \text{Hours worked} \times \left(\frac{\text{Real GDP}}{\text{Hours worked}}\right)$

• Growth rate formula: $\text{Growth rate of real GDP} = \text{Growth rate of hours worked} + \text{Growth rate of labor productivity}$

Tax Policy and Incentives

• Marginal tax rates affect decisions to work, invest, and start businesses.

• A large tax wedge (difference between pre-tax and post-tax returns) can reduce economic activity and real GDP.

• Tax simplification and lower marginal rates can improve incentives and potentially increase long-run growth.

Summary Table: Key Fiscal Policy Concepts

Concept	Definition	Example/Application
Automatic stabilizer	Spending/taxes that adjust with the business cycle	Unemployment insurance payments
Discretionary fiscal policy	Intentional changes in spending/taxes	Stimulus package
Multiplier effect	Amplified impact of initial spending	Government purchases multiplier
Crowding out	Reduction in private spending due to government spending	Higher interest rates reduce investment
Budget deficit	Expenditures > tax revenue	U.S. federal deficit during recession
Supply-side policy	Policies to increase potential GDP	Tax cuts to incentivize work/investment