Long-Run Self-Correction

You’ll be able to

Trace how an economy returns to potential output without policy intervention
Explain why self-correction is asymmetric and slow downward
Compare the final price level under self-correction versus active policy

The mechanism is the labor market

An economy left alone returns to potential, and the engine is wage adjustment. In a recessionary gap, unemployment is high, workers compete for scarce jobs, and nominal wages eventually fall. Lower wages lower production costs, shifting SRAS right until output reaches potential — at a lower price level. In an inflationary gap the reverse runs: labor is scarce, wages are bid up, SRAS shifts left, and output falls back to potential at a higher price level.

Self-correction outcomes

recessionary gap → wages fall → SRAS right → output ↑ to potential, price level ↓ · inflationary gap → wages rise → SRAS left → output ↓ to potential, price level ↑

Output always ends at potential. What differs between the two cases is the direction the price level moves.

Why it is much slower downward

Wages are sticky downward far more than upward. Explicit contracts, minimum wages, union agreements, and plain resistance to pay cuts mean firms lay workers off rather than cut wages. So an inflationary gap can close in a year or two while a recessionary gap can persist for many years. This asymmetry is the central practical argument for active stabilization policy: not that self-correction fails, but that waiting for it imposes years of avoidable unemployment.

Same output, different price level

Both routes out of a recessionary gap reach potential output, but they arrive at different price levels. Self-correction shifts SRAS right, so the economy ends at potential with a lower price level. Expansionary policy shifts AD right, so it ends at potential with a higher price level. The trade-off is therefore explicit: policy buys a faster return at the cost of a higher price level, and self-correction buys a lower price level at the cost of time.

Worked example

An economy sits in a recessionary gap. Trace the full self-correction path, then contrast it with the outcome if the government instead used expansionary fiscal policy.

1.Self-correction: high unemployment puts downward pressure on nominal wages.
2.Falling wages cut production costs, shifting SRAS right along the unchanged AD.
3.Output rises to potential and the price level falls. Slow, because wages resist falling.
4.Fiscal policy instead: higher G or lower T shifts AD right along the unchanged SRAS.
5.Output rises to potential and the price level rises. Faster, but inflationary.

Answer: Both end at potential output. Self-correction gets there with a lower price level but slowly; fiscal policy gets there quickly but with a higher price level and a larger budget deficit.

Watch out

Self-correction never moves LRAS. Potential output is unchanged throughout — the economy returns to it. A student who shifts LRAS to close a gap has described a growth event, not self-correction.

Checkpoint

An economy in an inflationary gap is left alone. In the long run:

Checkpoint

Self-correction from a recessionary gap is slow primarily because:

Checkpoint

Compared with waiting for self-correction, closing a recessionary gap with expansionary fiscal policy results in:

On the exam

When asked what happens "in the long run with no policy action", the answer is always that output returns to potential. Then say which curve moved and in which direction — that is where the remaining points are.

Answer the 3 checkpoints as you read.