Inflation, Deflation & Disinflation
- Inflation is the sustained increase in the average price level of goods/services in an economy
- The average price level is measured by checking the prices of a 'basket' of goods/services that an average household will purchase each month
- This basket of goods is turned into an index and it is called the consumer price index (CPI)
- The UK has an inflation target of 2% per annum
- Low inflation is better than no inflation as it is a sign of economic growth
- Low inflation is better than no inflation as it is a sign of economic growth
- Deflation occurs when there is a fall in the average price level of goods/services in an economy
- Deflation only occurs when the percentage change in prices falls below zero %
- Deflation only occurs when the percentage change in prices falls below zero %
- Disinflation occurs when the average price level is still rising, but at a lower rate than before
- These figures demonstrate disinflation: Y1 = 5% Y2 = 4% Y3 = 2%
- Inflation is increasing but at a decreasing rate
- These figures demonstrate disinflation: Y1 = 5% Y2 = 4% Y3 = 2%
Worked example
How would you characterise the fall in the CPI from 2018 to 2021? Explain your answer
Step 1: Study the time period and decide if you are witnessing inflation, disinflation or deflation
Disinflation
Step 2: Explain your answer
According to the CPI data, prices are still rising but at a decreasing rate. For example, in 2018 prices were rising at around 3%. In 2019 this increase fell to roughly 1.8%. In 2021, they were still rising but by a much lower 0.5%