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Long-run Effects of Economic Policies

Apr 30, 2025

Unit 5: Long-run Consequences of Stabilization Policies

Fiscal Policies

  • Expansionary Fiscal Policy
    • Increases Aggregate Demand (AD) curve in the short run.
    • Fixes recessionary gap and creates a budget deficit.
  • Contractionary Fiscal Policy
    • Decreases AD curve in the short run.
    • Fixes expansionary gap and creates a budget surplus.
  • Monetary Policies
    • Expansionary Monetary Policy increases AD, helps fix recessionary gaps.
    • Contractionary Monetary Policy decreases AD, helps fix expansionary gap.
  • Combination of Policies
    • Influences AD, real output, price level (PL), and interest rates.
    • Short-run government deficits can cause inflationary gaps and raise interest rates, delaying economic growth.
    • Long-run government deficits contribute to rising government debt.

Phillips Curve

  • Short-run Phillips Curve (SRPC)
    • Shows trade-off between unemployment rate and inflation rate.
    • Negative supply shock shifts SRPC up; positive supply shock shifts SRPC down.
    • Demand shocks move the economy along the SRPC.
  • Long-run Phillips Curve (LRPC)
    • Represents the natural rate of employment.
    • Intersection of SRPC & LRPC indicates long-run equilibrium.
    • Economy is in an inflationary gap if left to the equilibrium, recessionary gap if right.

Effects of Monetary Policy

  • Rapid expansionary monetary policy can lead to inflation when the economy is at full employment.
  • Quantity Theory of Money
    • Increase in the money supply leads to inflation in the long run.

Budget Balance

  • Calculated as: Tax revenue - government spending + transfer payments.
  • Budget Surplus: Tax revenue > Government spending.
  • Budget Deficit: Tax revenue < Government spending.
  • Accumulated debt increases national debt due to interest payments.

Crowding-out Effect

  • Government borrowing for a budget deficit increases money demand and interest rates, reducing private investment.
  • Can result in lower physical capital accumulation and less economic growth in the long run.

Economic Growth

  • Growth Rate of GDP/capita
    • Rule of 70: Time to double GDP/capita = 70 / (Annual growth rate).
  • Sources of Growth
    • Labor productivity, influenced by technology, physical and human capital.
    • More/better capital and technology lead to increased productivity.
    • Policies affecting productivity and employment influence economic growth.

Supply-side Fiscal Policies

  • Focus on employing contractionary fiscal policies to increase production.
  • Impact AD, SRAS, and potential output in the short run.

Key Terms

  • UMP: Unemployment
  • PL: Price Level
  • MB: Market Basket
  • G&S: Goods and Services
  • PV & FV: Present and Future Value
  • RGP: Real Gross Domestic Product
  • AD: Aggregate Demand
  • SRAS & LRAS: Short-run and Long-run Aggregate Supply
  • SRPC & LRPC: Short-run and Long-run Phillips Curve
  • PPC: Production Possibilities Curve

Sources

  • AP Macroeconomics Course and Exam Description
  • Krugman's Economics for AP
  • Various online educational resources