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2. List of price index formulas - Wikipedia

   en.wikipedia.org/wiki/List_of_price_index_formulas

   A price index aggregates various combinations of base period prices ( ), later period prices ( ), base period quantities ( ), and later period quantities ( ). Price index numbers are usually defined either in terms of (actual or hypothetical) expenditures (expenditure = price * quantity) or as different weighted averages of price relatives ...

3. Engineered stone - Wikipedia

   en.wikipedia.org/wiki/Engineered_stone

   Engineered stone is a composite material made of crushed stone bound together by an adhesive to create a solid surface. The adhesive is most commonly polymer resin, with some newer versions using cement mix. This category includes engineered quartz (SiO 2), polymer concrete and engineered marble stone. [1]

4. Installed base - Wikipedia

   en.wikipedia.org/wiki/Installed_base

   Installed base. Installed base of a product is the number of units that are currently in use by customers. It provides a measurement of a company's existing customer base and the extent of their investment in a particular product or technology. In contrast to market share, which only reflects sales over a specific period and relative to the ...

5. Price elasticity of demand - Wikipedia

   en.wikipedia.org/wiki/Price_elasticity_of_demand

   A good's price elasticity of demand ( , PED) is a measure of how sensitive the quantity demanded is to its price. When the price rises, quantity demanded falls for almost any good (law of demand), but it falls more for some than for others. The price elasticity gives the percentage change in quantity demanded when there is a one percent ...

6. Inflation - Wikipedia

   en.wikipedia.org/wiki/Inflation

   UK and US monthly inflation rates from January 1989 [1][2] In economics, inflation is a general increase in the prices of goods and services in an economy. This is usually measured using a consumer price index (CPI). [3][4][5][6] When the general price level rises, each unit of currency buys fewer goods and services; consequently, inflation ...

7. Price index - Wikipedia

   en.wikipedia.org/wiki/Price_index

   Price index. 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. It is a statistic designed to help to compare how these price relatives, taken as a whole, differ between ...