Area
The consumer price index (CPI) expresses the change in the prices of consumer goods and services. In order to calculate the consumer price index, it is first necessary to identify what an average private consumer regularly buys. The expenditures are then categorised according to the Classification of Individual Consumption According to Purpose, and shares in the total index, called index weights, are calculated. For the calculation of the index, it is also necessary to choose the goods and services for which price changes will be monitored. These are called representative goods. Then, it is