The measurement of production movements: Lessons from the general engineering industry in Italy, 1861-1913

In the literature the (Italian) engineering industry is seen as one that transformed metal into machines; its time path is inferred from that of its consumption of metal. Newly recovered evidence indicates that far more metal was turned into (traditional) hardware than into (modern) machines. Machine production grew rapidly from a very small base: metal consumption fails to capture this change in the product mix, and understates the growth of new production at constant prices. Moreover, maintenance activity was in general as significant as new production. Maintenance was labor-intensive rather than metal-intensive, trend-dominated rather than cyclical, and relatively larger, next to new production, in 1861 than in 1913: metal consumption overstates the growth rate of the industry's total product at constant prices, and much overstates its cyclical volatility. Technical progress was negligible in maintenance, but rapid in new production: constant-price-weighted physical measures fail to capture productivity growth, and even late-weighted series overstate the growth of the industry's real product. These results are not tied to conditions peculiar to pre-War Italy: the new estimates presented here pave the way for emending, or at least reevaluating, the engineering-industry product series reconstructed for other times or places.