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  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."

  3. Author-level metrics - Wikipedia

    en.wikipedia.org/wiki/Author-level_metrics

    Author-level metrics are citation metrics that measure the bibliometric impact of individual authors, researchers, academics, and scholars. Many metrics have been developed that take into account varying numbers of factors (from only considering the total number of citations, to looking at their distribution across papers or journals using statistical or graph-theoretic principles).

  4. Index (statistics) - Wikipedia

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

    Sample of a well maintained data [clarification needed]. 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.

  5. Raising and lowering indices - Wikipedia

    en.wikipedia.org/wiki/Raising_and_lowering_indices

    It is common convention to use greek indices when writing expressions involving tensors in Minkowski space, while Latin indices are reserved for Euclidean space. Well-formulated expressions are constrained by the rules of Einstein summation: any index may appear at most twice and furthermore a raised index must contract with a lowered index ...

  6. Fundamentally based indexes - Wikipedia

    en.wikipedia.org/wiki/Fundamentally_based_indexes

    If they did not, it would demonstrate a flaw in the Fama–French model. After controlling for Fama–French risk factors, fundamentally based indices exhibit a small positive alpha — albeit a statistically insignificant one. [20] Fundamentally based indices have higher turnover and therefore higher costs than capitalization weighted indices ...

  7. Cambridge International General Certificate of Education

    en.wikipedia.org/wiki/Cambridge_International...

    A student typically studies four subjects at Cambridge International AS-Level and finishes three of those subjects at Cambridge International A-Level. Each subject a student completes receives a separate grade. The different grades are allocated according to "difficulty" in exams by applying a so-called "grade threshold" scheme.

  8. A-level (United Kingdom) - Wikipedia

    en.wikipedia.org/wiki/A-level_(United_Kingdom)

    The O grade was equivalent to a GCE Ordinary Level pass which indicated a performance equivalent to the lowest pass grade at Ordinary Level.. Over time, the validity of this system was questioned because, rather than reflecting a standard, norm referencing simply maintained a specific proportion of candidates at each grade, which in small cohorts was subject to statistical fluctuations in ...

  9. Index (economics) - Wikipedia

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

    The GDP Deflator Index, or real GDP, measures the level of prices of all-new, domestically produced, final goods and services in an economy. [3] Market performance indices include the labour market index/job index and proprietary stock market index investment instruments offered by brokerage houses. Some indices display market variations.