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Definition: A comprehensive measure used for estimation of price changes in a basket of goods and services representative of consumption expenditure in an economy is called consumer price index.
Description: The calculation involved in the estimation of CPI is quite rigorous. Various categories and sub-categories have been made for classifying consumption items and on the basis of consumer categories like urban or rural. Based on these indices and sub indices obtained, the final overall index of price is calculated mostly by national statistical agencies. It is one of the most important statistics for an economy and is generally based on the weighted average of the prices of commodities. It gives an idea of the cost of living.
Inflation is measured using CPI. The percentage change in this index over a period of time gives the amount of inflation over that specific period, i.e. the increase in prices of a representative basket of goods consumed.
Also See: Industrial production index, personal consumption expenditure, producer price index, headline inflation, retail price index, Index-linked bond, consumer packaged goods.
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