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The Laspeyres price index is an index formula used in price statistics for measuring the price development of the basket of goods and services consumed in the base period. The question it answers is how much a basket that consumers bought in the base period would cost in the current period.

Paasche index, index developed by German economist Hermann Paasche for measuring current price or quantity levels relative to those of a selected base period. It differs from the Laspeyres index in that it uses current-period weighting.

The Fisher Index is a consumer price index used to measure the increase in prices of goods and services over a period of time and is calculated as the geometric mean of the Laspeyres Price Index and the Paasche Price Index.

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