Demand-Pull vs Cost-Push Inflation
Demand-pull inflation occurs when aggregate demand rises faster than the economy’s ability to produce goods and services at full employment. In other words, “too much money chases too few goods.” It typically arises due to increased consumption, investment, government expenditure, or net exports. In Keynesian terms, when aggregate demand exceeds aggregate supply at full employment, prices rise. Demand-pull inflation is often associated with booming economic conditions and low unemployment.
Cost-push inflation, on the other hand, arises from an increase in the cost of production, leading firms to raise prices to maintain profit margins. It is caused by factors such as rising wages (without corresponding productivity increases), higher raw material prices, increase in indirect taxes, or supply shocks like oil price hikes. Unlike demand-pull inflation, cost-push inflation can occur even during periods of low demand and economic slowdown.
Inflationary Gap
The concept of an inflationary gap was introduced by Keynes. It refers to the situation where aggregate demand at full employment exceeds aggregate supply at that level of output. At full employment, output cannot increase further in the short run due to resource constraints, so excess demand leads only to rising prices rather than higher output.
Graphically, the inflationary gap is the vertical distance between aggregate demand and aggregate supply at the full employment level of output. It represents the excess expenditure in the economy that causes upward pressure on prices. The gap can be corrected either by reducing aggregate demand or by increasing aggregate supply.
Policy Measures to Control Inflation (with reference to stagflation)
Inflation control policies are broadly classified into monetary, fiscal, and supply-side measures.
- Raising the bank rate and repo rate to make borrowing expensive
- Selling government securities in open market operations
- Increasing reserve requirements (CRR/SLR)These measures reduce liquidity and curb excessive demand in the economy.
- Cutting public expenditure, especially non-essential spending
- Increasing taxes to reduce disposable income
- Reducing fiscal deficits to limit money creationThese steps help in controlling demand-pull inflation effectively.
- Improving productivity through technology and infrastructure
- Reducing bottlenecks in production and distribution
- Controlling essential commodity prices in the short run
- Encouraging imports to ease shortages
Inflation and Stagflation
Stagflation refers to the simultaneous occurrence of high inflation, high unemployment, and low economic growth. It poses a major challenge because traditional demand-management policies become less effective. For example, reducing inflation through contractionary monetary or fiscal policy may worsen unemployment and slow down growth.
In stagflation, inflation is often cost-push in nature (such as oil price shocks). Therefore, policy focus shifts toward supply-side reforms, such as improving productivity, reducing production costs, encouraging investment, and removing structural rigidities in the economy. Wage-price controls may be used temporarily, but they are not a long-term solution.
Conclusion
Demand-pull inflation arises from excess demand, while cost-push inflation originates from rising production costs. The inflationary gap explains how excess demand at full employment leads to price increases. Controlling inflation requires a combination of monetary, fiscal, and supply-side measures. In conditions of stagflation, supply-side policies become especially important, as demand contraction alone cannot resolve both inflation and unemployment simultaneously.
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