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A consumer price index (CPI) is a statistical estimate of the level of prices of goods and services bought for consumption purposes by households. It is calculated as the weighted average price of a market basket of consumer goods and services. Changes in CPI track changes in prices over time. [1]
The consumer price index for urban wage earners and clerical workers (CPI-W) is a continuation of the historical index that was introduced after World War I for use in wage negotiation. [23] As new uses were developed for the CPI, the need for a broader and more representative index became apparent.
The CPI is calculated using the prices of tens of thousands of different goods and services. The U.S. Bureau of Labor Statistics (BLS) classifies expenditures into more than 200 categories that ...
From February 2011 the CPI (UNME) released by CSO is replaced as CPI (urban),CPI (rural) and CPI (combined). [18] Consumer Price Index is used in calculation of Dearness Allowance [ 19 ] which forms an integral part of salary of a Government Employee.Base year to calculate CPI is 2012=100.
A price index (plural: "price indices" or "price indexes") is a normalized average (typically a weighted average) of price relatives for a given class of goods or services in a given region, during a given interval of time.
All superlative indices produce similar results and are generally the favored formulas for calculating price indices. [14] A superlative index is defined technically as "an index that is exact for a flexible functional form that can provide a second-order approximation to other twice-differentiable functions around the same point." [15]
In contrast to a cost-of-living index based on the true but unknown utility function, a superlative index number is an index number that can be calculated. [1] Thus, superlative index numbers are used to provide a fairly close approximation to the underlying cost-of-living index number in a wide range of circumstances.
The inflation rate is most widely calculated by determining the movement or change in a price index, typically the consumer price index. [48] The inflation rate is the percentage change of a price index over time. The Retail Prices Index is also a measure of inflation that is commonly used in the United Kingdom. It is broader than the CPI and ...