4.10 - Inflation, Deflation & Disinflation
The meaning of price stability and its advantages
Price stability occurs when prices increase by only a small percentage and there are no significant fluctuations in the overall price level.
Benefits of low and stable inflation
A low and stable inflation rate offers several advantages, which is why many governments aim for price stability:
- Encourages business expansion - Firms are more likely to invest and grow when price changes are predictable, leading to higher national output.
- Boosts employment - Increased business activity creates more jobs.
- Supports public services - Higher economic output generates more tax revenue, providing additional resources for areas like healthcare and education.
Some economies face high inflation rates or large price fluctuations, while others experience falling price levels.
The concept of inflation and its impact on purchasing power
Inflation refers to a rise in the average level of prices across an economy at a specific rate. Not all prices increase at the same pace; some may rise more than the average, while others could even decrease.
Effects of rising price levels
When the general price level increases:
- The value of money decreases.
- The purchasing power of money declines, meaning the same amount of money buys fewer goods and services.
Types of inflation, deflation, and disinflation
- Creeping inflation - A low and stable rate of inflation, typically around 2%. This is not usually harmful and can even encourage production.
- Hyperinflation - An extremely high inflation rate exceeding 50% per month. This can cause currency collapse, leading economies to revert to barter systems. For example, Zimbabwe in 2008 saw inflation rates estimated between 200 million percent and 89 sextrillion percent.
- Deflation - A sustained decrease in the price level, resulting in an increase in the value of money. This involves a negative inflation rate, such as -2%.
- Disinflation - A reduction in the inflation rate while it remains positive, for example, falling from 7% to 4%. Prices continue to rise, but at a slower pace.
Methods and formula for calculating the inflation rate
The inflation rate measures the percentage change in the price level from one period to another.
Approaches to measuring inflation
- Annual average method - Compares the average price level over a 12-month period with the average from the previous 12 months.
- Year-on-year method - Calculates the percentage change in the price level for a specific month compared to the same month in the previous year.
Formula for calculating inflation rate
Where:
- Change in price level = New price level minus original price level
- Original price level = Price level at the start of the period
Worked example - Calculating the inflation rate
The price level in an economy rises from 150 in April 2023 to 159 in April 2024. Calculate the inflation rate.
Step 1: Identify the values
- Original price level = 150
- New price level = 159
Step 2: Calculate the change in price level
Change in price level = 159 - 150 = 9