enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    All superlative indices produce similar results and are generally the favored formulas for calculating price indices. [14] A superlative index is defined technically as "an index that is exact for a flexible functional form that can provide a second-order approximation to other twice-differentiable functions around the same point." [15]

  3. Consumer price index - Wikipedia

    en.wikipedia.org/wiki/Consumer_price_index

    A CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically. Sub-indices and sub-sub-indices can be computed for different categories and sub-categories of goods and services, which are combined to produce the overall index with weights reflecting their shares in the total of the consumer expenditures covered by the ...

  4. Price index - Wikipedia

    en.wikipedia.org/wiki/Price_index

    2003: original index value was $2.80; $2.80/$2.50 = 112%, so new index value is 112; When an index has been normalized in this manner, the meaning of the number 112, for instance, is that the total cost for the basket of goods is 4% more in 2001 than in the base year (in this case, year 2000), 8% more in 2002, and 12% more in 2003.

  5. Modified Dietz method - Wikipedia

    en.wikipedia.org/wiki/Modified_Dietz_method

    The modified Dietz method [1] [2] [3] is a measure of the ex post (i.e. historical) performance of an investment portfolio in the presence of external flows. (External flows are movements of value such as transfers of cash, securities or other instruments in or out of the portfolio, with no equal simultaneous movement of value in the opposite direction, and which are not income from the ...

  6. Index (economics) - Wikipedia

    en.wikipedia.org/wiki/Index_(economics)

    The index number problem is the term used by economists to describe the limitation of statistical indexing, when used as a measurement for cost-of-living increases. [7] For example, in the Consumer Price Index, a reference year's "market basket" is assigned an index number of 100.

  7. Volatility (finance) - Wikipedia

    en.wikipedia.org/wiki/Volatility_(finance)

    The average magnitude of the observations is merely an approximation of the standard deviation of the market index. Assuming that the market index daily changes are normally distributed with mean zero and standard deviation σ, the expected value of the magnitude of the observations is √(2/ π)σ = 0.798σ. The net effect is that this crude ...

  8. Lerner index - Wikipedia

    en.wikipedia.org/wiki/Lerner_Index

    For L = -1/E d and E d = -1/L, the elasticity of demand for industry A will be -2.5. We can use the value of the Lerner index to calculate the marginal cost (MC) of a firm as follows: 0.4 = (10 – MC) ÷ 10 ⇒ MC = 10 − 4 = 6. The missing values for industry B are found as follows: from the E d value of -2, we find that the Lerner index is ...

  9. Index (statistics) - Wikipedia

    en.wikipedia.org/wiki/Index_(statistics)

    In statistics and research design, an index is a composite statistic – a measure of changes in a representative group of individual data points, or in other words, a compound measure that aggregates multiple indicators. [1] [2] Indices – also known as indexes and composite indicators – summarize and rank specific observations. [2]