Supply-Side Policy and LRAS

What this diagram shows

This diagram illustrates how supply-side policies shift the Long Run Aggregate Supply (LRAS) curve to the right, demonstrating an increase in an economy's productive potential. Supply-side policies aim to improve the economy's ability to produce goods and services by enhancing the quantity and quality of factors of production. The rightward shift shows that the economy can now produce more output at every price level, leading to sustainable economic growth without inflationary pressure. Because SRAS also shifts right (SRAS₁ to SRAS₂), the new equilibrium where AD meets SRAS₂ lies on LRAS₂, so it is both a short-run and a long-run equilibrium. This is crucial for understanding how governments can achieve long-term improvements in economic performance.

Key points

• Supply-side policies shift LRAS right by increasing the economy's productive capacity and potential output
• The shift results in higher real GDP and lower price levels, achieving the ideal combination of growth with reduced inflation
• Examples include education and training (improving labour quality), infrastructure investment, deregulation, and tax reforms
• Unlike demand-side policies, supply-side policies create sustainable long-term growth without creating inflationary pressure
• The effectiveness depends on the time lag - supply-side policies typically take years to show full impact on productive capacity