AS Macro Key Term: Demand Pull Inflation

Demand pull inflation occurs when aggregate demand and output is growing at an unsustainable rate leading to increased pressure on scarce resources and a positive output gap. When there is excess demand in the economy, producers are able to raise their prices and achieve bigger profit margins because they know that demand is running ahead of supply. Typically, demand-pull inflation becomes a threat when an economy has experienced a strong boom with GDP rising faster than the long run trend growth of potential GDP. Demand-pull inflation is likely when there is full employment of resources and aggregate demand is increasing at a time when SRAS is inelastic.

UK Output Gap

United Kingdom Output Gaps from Timetric

The main causes of demand-pull inflation

1. A depreciation of the exchange rate which increases the price of imports and reduces the foreign price of UK exports. If consumers buy fewer imports, while exports grow, AD in will rise – and there may be a multiplier effect on the level of demand and output

2. Higher demand from a fiscal stimulus e.g. via a reduction in direct or indirect taxation or higher government spending. If direct taxes are reduced, consumers will have more disposable income causing demand to rise. Higher government spending and increased government borrowing feeds through directly into extra demand in the circular flow

3. Monetary stimulus to the economy: A fall in interest rates may stimulate too much demand – for example in raising demand for loans or in causing sharp rise in house price inflation. Monetarist economists believe that inflation is caused by “too much money chasing too few goods” and that governments can lose control of inflation if they allow the financial system to expand the money supply too quickly.

4. Fast economic growth in other countries – providing a boost to UK exports overseas. Export sales provide an extra flow of income and spending into the UK circular flow – so what is happening to the economic cycles of other countries definitely affects the UK

United Kingdom from Timetric

Controlling inflation

Inflation can be reduced by policies that (i) slow down the growth of AD or (ii) boost the rate of growth of aggregate supply (AS). The main anti-inflation controls available to a government are:

1. Fiscal policy: If the government believes that AD is too high, it may choose to ‘tighten fiscal policy’ by reducing its own spending on public and merit goods or welfare payments. Or it can choose to raise direct taxes, leading to a reduction in real disposable income. The consequence may be that demand and output are lower which has an effect on jobs and real economic growth in the short-term.

2. Monetary policy: A ‘tightening of monetary policy’ involves the central bank introducing a period of higher interest rates to reduce consumer and investment spending. Monetary policy is designed mainly to control demand-pull inflationary pressures. But it also has an effect on costs, not least through the effect of changes in interest rates on the value of the currency.

3. Supply side economic policies: Supply side policies include those that seek to increase productivity, competition and innovation – all of which can maintain lower prices. These are important ways of controlling inflation in the medium term.

The most appropriate way to control inflation in the short term is for the government and the central bank to keep control of aggregate demand to a level consistent with our productive capacity.

The consensus among economists is that AD is probably better controlled through the use of monetary policy rather than an over-reliance on using fiscal policy as an instrument of demand-management. But in the long run, it is the growth of a country’s supply-side productive potential that gives an economy the flexibility to grow without suffering from acceleration in cost and price inflation.