Demand-Pull Inflation vs Cost-Push Inflation
Demand-Pull Inflation and Cost-Push Inflation are two Unemployment & Inflation concepts in AP Economics that students often mix up. Demand-pull inflation is a rise in the general price level caused by an increase in aggregate demand that outpaces what the economy can produce. Cost-push inflation is a rise in the general price level caused by higher production costs, which shift short-run aggregate supply to the left. Here is how they compare side by side.
Demand-pull inflation occurs when aggregate demand exceeds the available supply of goods and services, causing prices to rise. This type of inflation is often caused by an increase in consumer spending, investment, or government expenditure. As demand increases, businesses respond by raising their prices, leading to inflation. Demand-pull inflation can be controlled by reducing aggregate demand through monetary or fiscal policy.
Cost-push inflation occurs when there is an increase in the costs of production, such as wages or raw materials, which leads to an increase in prices. This type of inflation is often caused by supply chain disruptions, increases in commodity prices, or labor market shortages. As costs rise, businesses respond by raising their prices, leading to inflation. Cost-push inflation can be controlled by reducing costs or improving productivity.
Demand-Pull vs Cost-Push Inflation: Which Curve Moved
| Demand-pull inflation | Cost-push inflation | |
|---|---|---|
| Which curve shifts | Aggregate demand shifts right | Short-run aggregate supply shifts left |
| Price level | Rises | Rises |
| Real output | Rises | Falls |
| Unemployment | Falls | Rises |
| Common causes | Spending booms, tax cuts, an increase in the money supply, export surges | Oil price spikes, wage increases beyond productivity, supply chain shocks, poor harvests |
| Policy dilemma | None. Contractionary policy fixes both problems at once | Real. Fighting inflation deepens the recession, fighting the recession worsens inflation |
| Phillips curve | A movement along the short-run curve | A rightward shift of the short-run curve |
Read the output direction and you know which one it is
Both raise the price level, so the price level alone tells you nothing. Real output is the giveaway. If output and employment rise alongside prices, aggregate demand moved and it is demand-pull. If output and employment fall while prices rise, short-run aggregate supply moved and it is cost-push, which is the definition of stagflation. When a free-response prompt describes a scenario without naming the type, find the sentence about GDP or unemployment first, then decide which curve to shift. Getting this backwards costs every subsequent point in the question, because the rest of the answer builds on the shift. Work through both on /sandbox/adas.
Why cost-push creates a genuine policy dilemma
Demand-pull inflation is uncomfortable but straightforward. Contractionary fiscal or monetary policy shifts aggregate demand back left, which lowers the price level and cools an overheated economy that was above full employment anyway. Both problems improve together. Cost-push is harder. The economy has high prices AND high unemployment at the same time, and the standard demand-side tools move those two in opposite directions. Contractionary policy brings prices down but pushes output lower still. Expansionary policy restores output but pushes prices higher. There is no demand-side move that fixes both, which is why the policy answer to a supply shock usually involves either waiting for the short-run aggregate supply curve to shift back or acting on the supply side directly, through productivity, training, or reducing input costs.
The long run resolves them differently
Left alone, a demand-pull expansion pushes output above full employment, which bids up wages and other input prices, which shifts short-run aggregate supply left until output returns to potential at a permanently higher price level. A cost-push shock does the reverse: with output below potential, wages and input prices eventually fall, short-run aggregate supply shifts back right, and the economy returns to potential at the original price level. Both end at the long-run aggregate supply curve, but the price level ends up higher after demand-pull and back where it started after cost-push. Being able to state where the economy ends up, and why, is what separates a three-point answer from a one-point answer on this topic. See the sequence traced at /graph-walkthroughs.
Frequently asked questions
What is the difference between demand-pull and cost-push inflation?
Demand-pull inflation comes from a rightward shift in aggregate demand, so prices and real output both rise and unemployment falls. Cost-push inflation comes from a leftward shift in short-run aggregate supply, so prices rise while real output falls and unemployment rises. The direction of output is what tells them apart.
Is stagflation demand-pull or cost-push?
Cost-push. Stagflation means stagnant output with rising prices, which only happens when short-run aggregate supply shifts left. A demand shift moves prices and output in the same direction, so it cannot produce stagnation and inflation together.
Which type of inflation is harder to fix?
Cost-push, because demand-side policy cannot improve both problems at once. Reducing aggregate demand lowers inflation but deepens the recession; increasing it restores output but raises inflation further. Demand-pull inflation is easier because contractionary policy addresses the overheating and the price rise together.
Want the long version? Demand-Pull vs Cost-Push Inflation: Two Types of Inflation Explained walks through the same comparison as a full guide, with worked examples and the exam traps. This page is the quick side-by-side.
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