Why it matters
A changing price level affects purchasing power and comparisons over time. Separating levels from rates makes headlines about “falling inflation” much easier to interpret.
A worked example
A representative basket costs £100, then £105. That is 5% inflation. If it next costs £107.10, annual inflation is 2% even though the basket is still dearer.
Illustrative example · simplified assumptionsA common mistake
Expecting prices to return to their old level when inflation slows.
Where the idea needs care
Your personal spending basket may differ from an official index. Falling inflation is not necessarily falling prices.
Apply the idea
Explain this concept using a different example from your spending, work, business or a policy debate. State what stays fixed and what could change the result.
Sources and further study
Examples and explanations by Alibomics. Numeric illustrations are not current market quotations.