The **Consumer Price Index (CPI)** is a key economic indicator that measures the average change in prices paid by consumers for a basket of goods and services over time. It is used to assess inflation, cost of living, and economic stability. The CPI includes categories such as food, housing, transportation, and healthcare, reflecting the purchasing habits of typical households.
### Calculation:
CPI is calculated by comparing the cost of a fixed basket of goods in a given period to the cost of the same basket in a base period. The formula is:
\[
CPI = \frac{Cost\:of\:Basket\:in\:Current\:Year}{Cost\:of\:Basket\:in\:Base\:Year} \times 100
\]
### Uses:
1. **Inflation Measurement**: CPI tracks how prices change over time, indicating the inflation rate.
2. **Adjustment of Wages and Benefits**: It is used to adjust wages, pensions, and social security benefits for inflation.
3. **Economic Policy**: Governments and central banks use CPI to guide monetary and fiscal policy decisions.
The CPI is vital for understanding economic health and the real value of money in a society.
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