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Unweighted, or "elementary", price indices only compare prices of a single type of good between two periods. They do not make any use of quantities or expenditure weights. They are called "elementary" because they are often used at the lower levels of aggregation for more comprehensive price indices. [2]
A Törnqvist or Törnqvist-Theil price index is the weighted geometric mean of the price relatives using arithmetic averages of the value shares in the two periods as weights. [ 1 ] The data used are prices and quantities in two time-periods, (t-1) and (t), for each of n goods which are indexed by i .
The direct comparison method assumes that the difference in the price of the two items is not due to quality change, so the entire price difference is used in the index. P ( N ) t + 1 {\displaystyle P(N)_{t+1}} / P ( M ) t {\displaystyle P(M)_{t}} is used as the price relative.
A comparison shopping website, sometimes called a price comparison website, price analysis tool, comparison shopping agent, shopbot, aggregator or comparison shopping engine, is a vertical search engine that shoppers use to filter and compare products based on price, features, reviews and other criteria.
A relative price is the price of a commodity such as a good or service in terms of another; i.e., the ratio of two prices. A relative price may be expressed in terms of a ratio between the prices of any two goods or the ratio between the price of one good and the price of a market basket of goods (a weighted average of the prices of all other goods available in the market).
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Markup price = (unit cost * markup percentage) Markup price = $450 * 0.12 Markup price = $54 Sales Price = unit cost + markup price. Sales Price= $450 + $54 Sales Price = $504 Ultimately, the $54 markup price is the shop's margin of profit. Cost-plus pricing is common and there are many examples where the margin is transparent to buyers. [4]
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