Istat working papers 12/2023

Marco Lattanzio

Full text of the 12/2023 issue (in Italian)

This work shows the results of a study for defining a theoretical and analytical framework on the fixed base index numbers calculated on ratio variables, focussing on some of their properties to be considered when used. To provide hints to explain its dynamic, the general index is broken down into individual components with respect to any possible classification of units, and analysed in relation to the dynamics of its numerator and denominator. The same breakdowns are spelled out for the calculation of the related growth rates. As case study, the quarterly indexes of wages per Fte calculated by the Oros survey are considered. Furthermore, a general formula for decomposing growth rates based on the relation between indexes is presented.