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SummaryThe influence of the choice of the weights on the value of an indexnumber.Price and quantity indexnumbers are weighted averages of groups of price and quantity ratios and they are convenient instruments to indicate the general tendency of such groups, especially if the number of basic ratios is considerable. The frequent use of indexnumbers is due to the fact that they can often be applied to problems for which, strictly speaking, an indexnumber had to be used derived from the same group of ratios but based on a different set of weights.Two typical examples of such problems are given.The use of a set of weights differing from the appropriate one is only justified, however, when the indexnumber is rather insensitive to changes in the set of weights. A simple formula is derived showing that the relative change of an index‐number due to a change in the set of weights is equal to the product of the (weighted) coefficient of variation of the basic ratios, the (weighted) standard deviation of the relative changes of the weights and the (weighted) coefficient of correlation of the ratios and of the relative changes. The system of weights used in the calculation of these three factors is the same and is equal to the set of true weights belonging to the problem under consideration.The practical use of the formula is demonstrated at the problem of index‐numbers of costs frequently encountered in the practice of cost accounting.

[Geb. 9. März 85 Berlin; Wohnort: Berlin; Staatsangeh.: Preussen; Vorbildung: Protest. Gymn. Strassburg Reife O. 05.; Studium: Strassburg 5, Heidelberg I, Strassburg 3 S.] ; Ref. Wiegand. ; Phil. Diss. v. 24. Juli 1909--Strassburg. ; Mode of access: Internet.

Re/Presenting Class is a timely and evocative collection of essays devoted to exploring the contribution postmodern Marxist class theory can make to the contemporary study of political economy. This multifaceted exploration marks a refreshing departure from the conventional focus of the political economic tradition on classical Marxist analysis of the capitalist system as a total system or mode of production. On this conventional approach, class functions merely as an instrument of the dominant mode of capital accumulation. By contrast, the essays in Gibson-Graham, Resnick and Wolff's collection employ various forms of class analysis as an independent means to illuminate contemporary and historical political economies. Here class is understood not simply as an instrumentality of capitalist accumulation, but as a set of independent "processes of producing, appropriating and distributing surplus labor" (17, 169). In essence, the essays attempt, in various ways, to extricate class analysis from general "theory of the capitalist totality," (1) and to examine what kinds of insight it can offer as an independent framework in its own right. In general, the project repays the investment just as the book rewards reading.