Starting from the publication of the January 2024 data, the industrial production indices are released in the new reference base 2021=100. The calculation base has also been updated and now relates to 2023. The methodological aspects and the main effects produced by the rebasing on the evolution of the indices are illustrated in this information note.
The 2024 indices are calculated using the chaining method introduced by the publication of the indices relating to the month of January 2022. The innovations introduced concern not only the change in the reference base but also the sources used, the updating of the sample of enterprises used in the survey, the revision of the weighting system, the updating of the basket of goods.
Starting from this edition, the survey on industrial production uses information deriving from the survey on industrial turnover, appropriately deflated, for some groups of economic activity.
In the comparison between the weighting structures of the 2022 and 2023 calculation base, some variations in the weights for the different groupings emerge: a decrease in the incidence of consumer goods corresponds to an increase of the same intensity as that of intermediate goods. Furthermore, the decrease in the incidence of capital goods corresponds to the increase in the share for energy. As for the 2022 base, the sectors with the greatest incidence in the industrial production index are those of the metallurgy and manufacturing of metal products industry (15.9%) and that of the manufacturing of machinery and equipment not classified elsewhere (13,1%). The sectors with the greatest incidence in the industrial production index are those of the metallurgy and metal product manufacturing industry (with a weight of 14.4%) and that of the manufacturing of machinery and equipment not classified elsewhere (13.6%).
With the transition to the 2023 calculation base, the previous basket of 612 macro items has changed, also following innovations on the sources used. Against 58 eliminated macroproducts, 40 were inserted: the number of elementary macroproducts of the new base is therefore equal to 594. For the 2023 base, the enterprises in which monthly production is recorded are just under 5,400; the responding units are instead 5,700 and communicate data relating to approximately 9,500 monthly production flows
The industrial production indices starting from 1990 and up to the economic activity class level with a reference base of 2021=100 are published on the IstatData website at https://esploradati.istat.it. Calculation based data is available upon request.