Causes & Consequences of Inflation (Cambridge (CIE) IGCSE Economics): Revision Note

The causes of inflation

• An increase in the general price level in an economy can be caused by demand-pull inflation, cost-push inflation, or imported inflation

1. Demand-pull inflation

• Demand-pull inflation is caused by excess demand in the economy

• Total (aggregate) demand is the sum of all expenditure in the economy

  • rGDP = Consumption (C) + Investment (I) + Government spending (G) + Net Exports (X-M)

• If any of the four components of rGDP increase, there will be an increase in the total demand (AD) in the economy, leading to an increase in the general price level

Diagram analysis

• If any of the four components of AD increase, there will be a shift to the right of the AD curve from AD₁ → AD₂

• This causes the average price level to increase from AP₁ → AP₂

• Demand-pull inflation has occurred 

An example of demand-pull inflation

• If the Central Bank lowers the base rate, there is likely to be increased borrowing by firms and consumers

  • This will result in an increase in consumption and investment, which will increase the rGDP

  • It is likely to lead to a form of demand-pull inflation

 2. Cost-push inflation

• Cost-push inflation is caused by increases in the costs of production in an economy

• If any of the costs of production increase (labour, raw materials etc.), or if there is a fall in productivity, the total supply will decrease

• With less supply, prices rise, leading to an increase in the general price level

• Cost-push inflation has occurred

Diagram analysis

• If any of the costs of production increase (labour, raw materials etc.), or if there is a fall in productivity, there will be a shift to the left of the SRAS curve from SRAS₁→SRAS₂

• This increases the average price level from AP₁ → AP₂

• Cost-push inflation has occurred

An example of cost-push inflation

• Trade unions negotiate higher wages for workers

  • The wage increases represent an increased cost of production for firms

• With the inputs, firms now produce less and supply reduces, leading to higher general price levels

• Cost-push inflation has occurred

3. Imported inflation

• Imported inflation happens when the prices of goods and services that a country imports go up, causing overall prices in the domestic economy to rise

• If a country relies on imports for raw materials, fuel or food, any increase in global prices raises production costs for domestic firms

  • For example, if the price of imported oil rises, transport and production costs increase in many industries

  • This leads to higher prices for a wide range of goods.

• Higher costs are usually passed on to consumers as higher prices, leading to cost-push inflation

• A fall in the exchange rate (weaker currency) can also lead to imported inflation

  • A weaker currency makes foreign goods more expensive, even if the foreign price hasn’t changed

The consequences of inflation

• Inflation means that the general price level is rising over time. It reduces the purchasing power of money and can affect different groups in different ways

The effects on savers, lenders and borrowers

The effects on firms and consumers

The effects on workers and the government