26.2 The Policy Implications of the Neoclassical Perspective

Neoclassical Perspective on Macroeconomic Policy

The neoclassical perspective argues that the economy is self-correcting in the long run. Wages and prices eventually adjust to bring the economy back to its natural level of output, which means government policy has limited power to permanently boost employment or GDP. Understanding this view is essential because it directly shapes debates about how much (or how little) governments should intervene in the economy.

This contrasts sharply with the Keynesian view, which calls for active fiscal and monetary policy. The core disagreement comes down to how quickly markets adjust and how long the short run actually lasts.

Neoclassical Phillips Curve

The Phillips Curve shows the relationship between inflation and unemployment, and the neoclassical version makes a strong claim: there is no long-run tradeoff between the two.

• Long-run Phillips Curve: A vertical line at the natural rate of unemployment. Because wages and prices are flexible over time, the economy always gravitates back to this natural rate regardless of inflation. You can have 2% inflation or 10% inflation, but unemployment settles at the same point.
• Short-run Phillips Curve: Downward sloping, reflecting the fact that wages and prices are sticky in the short run. Temporarily, pushing unemployment below the natural rate does come with higher inflation, and vice versa.
• The key implication: If policymakers try to hold unemployment permanently below the natural rate (say, through constant stimulus), they won't succeed. Instead, they'll get accelerating inflation as workers and firms continuously adjust their expectations upward. In extreme cases, this can spiral into hyperinflation.

Fiscal and Monetary Policy Impact

Neoclassical economists hold that aggregate supply is the primary determinant of long-run output. Fiscal and monetary policies only shift aggregate demand, so their real effects are temporary.

Here's how that plays out for each type of policy:

Expansionary policies (increased government spending, tax cuts, or increased money supply):

1. Aggregate demand shifts right.
2. In the short run, output and employment rise.
3. Over time, higher demand pushes up wages and prices.
4. In the long run, output returns to its natural level, and the only lasting effect is a higher price level.

A related concern with fiscal expansion specifically is crowding out: when government borrowing drives up interest rates, it reduces private investment, partially or fully offsetting the stimulus.

Contractionary policies (decreased government spending, tax increases, or decreased money supply):

1. Aggregate demand shifts left.
2. In the short run, output and employment fall.
3. Over time, lower demand puts downward pressure on wages and prices.
4. In the long run, output returns to its natural level at a lower price level.

The risk here is that aggressive monetary contraction can trigger a deflationary spiral, where falling prices lead to reduced spending, which causes prices to fall further.

Neoclassical vs. Keynesian Economics

These two schools disagree on three fundamental questions: