Malgarini, Marco; Margani, Patrizia; Martelli, Bianca Maria - Istituto Nazionale di Statistica (ISTAT) - 2005
classification, re-codified to obtain harmonized data for the Main Industrial Groups and total manufacturing. Size weights were used … weights, based on a four-stage method in which, firstly, the balance Ba,j for question a, firm j, is aggregated in each strata …, using the j-firm employees as weights; in the following stages, the result for each strata is progressively aggregated to …