Lecture Notes: Unemployment and Fiscal Policy

Key Points

• Fluctuations in aggregate demand affect GDP growth via a multiplier process.
• Post-WWII increase in government size coincided with smaller economic fluctuations.
• Governments use taxes and spending changes to stabilize, but poor policies can destabilize.
• Individual savings don't increase collective wealth without government or firm spending.
• National economies are embedded in the global economy, impacting policy effectiveness.

Historical Context

• John F. Kennedy sought economic education prior to presidency.
• Kennedy learned Keynesian economics, emphasizing government’s role in economic stability.
• Post-WWII, US GDP growth fluctuated less with increased government role in economy.

Multiplier Effect

• Investment spending influenced by future profit expectations.
• Changes in income affect spending, amplifying demand shocks.
• Multiplier concept explains total GDP increase from initial spending is more than the spending itself.

Aggregate Demand and Consumption

• Aggregate demand equals GDP components: Consumption (C), Investment (I), Government Spending (G), Exports (X), Imports (M).
• Multiplier is greater than 1 if consumption from income increase is less than 1.

Consumption Function

• Aggregate consumption depends on current disposable income and autonomous consumption.
• Marginal Propensity to Consume (MPC) indicates consumption response to income changes.
• Variations in wealth and credit constraints influence consumption sensitivity.

Investment Spending

• Firms decide between dividends, savings, domestic and foreign investments.
• Interest rates influence investment decisions.
• Government and central bank policies affect interest rates, impacting investment levels.

Fiscal Policy

• Government spending stabilizes economy by providing consistent demand.
• Unemployment benefits help smooth consumption during income fluctuations.
• Fiscal policy can stabilize or destabilize economic cycles through spending and taxation adjustments.

Multiplier Model with Government and Trade

• Government and net exports modify multiplier effects.
• Taxation and imports reduce the multiplier’s impact by acting as leakages.

Fiscal Stimulus and Austerity

• Fiscal stimulus (increased spending or tax cuts) aims to counteract aggregate demand falls.
• Austerity during recessions can deepen economic downturns.

External Economic Influences

• Foreign market changes affect domestic economic cycles through net exports.
• Imports reduce domestic economic fluctuations by dissipating demand abroad.

Policies and Economic Interdependence

• Coordinated international fiscal policies can enhance domestic stimulus effectiveness.

Business Cycle Integration

• Economy fluctuates around a long-run labor market equilibrium.
• Multiplier model (short-term) and labor market model (medium-term) explain cyclical unemployment.

Conclusion

• Shocks to aggregate demand are amplified by the multiplier effect.
• Larger governments and automatic stabilizers have reduced economic volatility in advanced economies post-WWII.
• Effective fiscal policy plays a critical role in stabilizing economies during deep recessions.