consumer price index
C1Formal, Technical, Academic, Business, Journalistic
Definition
Meaning
A statistical measure of the average change in prices of a fixed basket of goods and services typically purchased by households, used as an indicator of inflation and cost of living.
An economic indicator, often published monthly, tracking price changes for consumer goods and services. It serves as a key benchmark for adjusting pensions, wages, and tax brackets, and is a primary tool for central banks in setting monetary policy.
Linguistics
Semantic Notes
The CPI is often conflated with the general inflation rate, but it is a specific, household-focused measure. 'Core CPI' excludes volatile food and energy prices for a clearer underlying trend. It is a singular concept, typically used with the definite article ('the CPI').
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. The acronym 'CPI' is standard in both. The Office for National Statistics (ONS) publishes it in the UK; the Bureau of Labor Statistics (BLS) publishes it in the US.
Connotations
In both varieties, it carries connotations of economic health, inflation anxiety, and policy-making.
Frequency
Equally high frequency in economic/financial contexts in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
The CPI rose/fell by X%CPI figures show/indicate that...according to the latest CPIan increase in the CPICPI for [category, e.g., housing]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No specific idioms. It is a technical term.]”
Usage
Context Usage
Business
Used for forecasting costs, setting prices, and negotiating wages. 'The CFO reviewed the CPI forecast before finalising the budget.'
Academic
Central to macroeconomic studies, econometric models, and papers on inflation dynamics. 'The study regressed wage growth against lagged CPI values.'
Everyday
Mentioned in news reports about the economy and personal finance. 'My pension increase is linked to the CPI.'
Technical
Precise definition of the basket, weighting, and calculation methodology (e.g., Laspeyres formula). 'The hedonic quality adjustment was applied to the CPI's electronics component.'
Examples
By Part of Speech
verb
British English
- The figures are CPI-adjusted.
- Benefits will be uprated in line with CPI.
American English
- The contract is CPI-indexed.
- They CPI-adjusted the historical data.
adverb
British English
- [Not standard. Typically used adjectivally or nominally.]
American English
- [Not standard. Typically used adjectivally or nominally.]
adjective
British English
- We are seeing CPI-linked increases.
- The CPI figure was below expectations.
American English
- Look at the CPI data release.
- A CPI-based adjustment was applied.
Examples
By CEFR Level
- The news said the price of food is going up. They use a number called the consumer price index.
- If the consumer price index rises, it means life is getting more expensive for ordinary people.
- The government has announced that pensions will increase by 3.2%, in line with the latest consumer price index.
Learning
Memory Aids
Mnemonic
Think of a CONSUMER at the PRICE tag INDEX (list) in a supermarket. The CPI is an indexed list of prices from a consumer's perspective.
Conceptual Metaphor
ECONOMIC HEALTH IS BODILY HEALTH (The CPI is a thermometer for the economy). A GAUGE/MEASURE (The CPI gauges inflationary pressure).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'индекс потребителя' (incorrect). The correct term is 'индекс потребительских цен' (ИПЦ).
- Do not confuse with 'индекс инфляции' – CPI is a specific type of inflation index.
Common Mistakes
- Using 'CPI' as a plural (e.g., 'The CPIs are rising'). It is singular.
- Pronouncing the acronym as individual letters (/siː piː aɪ/); it's commonly said as the full phrase.
- Confusing it with the Retail Price Index (RPI), which uses a different formula and basket.
Practice
Quiz
What is the primary purpose of the Consumer Price Index (CPI)?
FAQ
Frequently Asked Questions
The CPI is a primary measure used to calculate the inflation rate. The inflation rate is often the annual percentage change in the CPI.
In the UK, it's the Office for National Statistics (ONS). In the US, it's the Bureau of Labor Statistics (BLS).
The Retail Price Index (RPI) includes housing costs like mortgage interest, which the UK CPI does not. The CPI is the UK's official measure and uses a different mathematical formula.
It influences interest rates set by the central bank, annual adjustments to state pensions, benefits, and some salaries and commercial contracts, directly impacting your cost of borrowing and income.
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