A numerical approach for compiling full Physical Supply-Use Tables (PSUTs) under conflicting information

Abstract : Physical Supply-Use Tables (PSUTs) provide a comprehensive accounting of anthropogenic material flows within the economy and in interaction with the natural environment. Balanced PSUTs most often subsequently need to be converted to Physical Input-Output Tables (PIOTs) in order to address environmental issues. PSUT compilation, including data mining and mass balancing, requires large scale efforts. At the same time the benefits gained from PIOTs (in terms of environmental information and modelling) do not seem to be convincing enough for the National Statistical Institutes to plan their large scale production [8]. Accordingly there is a strong need to limit the cost and time required for PSUTs and PIOTs compilation while at the same improving their reliability. This work proposes a numerical approach to balance full PSUTs under conflicting information using the notation of constrained optimization. The mass balancing identities of PSUTs, in terms of products and activities, are applied in a mathematical technique which fulfills all requirements of constrained optimization techniques. Following the theoretical framework as defined in a first part, a tentative PSUT for the Netherlands 2006 is presented as a case study (being validated). Such an approach could constitute a major advance for the practice of compiling PSUTs before deriving PIOTs, since it aims to remove the necessity of manually tracing conflicting information. In addition, this article gives some guidelines for future research (e.g. a full PSUT compiled for France for the year 2006) which could help to make PIOTs more relevant and cost-effective.
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Communication dans un congrès
12° WORKSHOP APDR | INPUT-OUTPUT MODELS, Feb 2012, Leiria, Portugal. pp.ID 1009,, 2012
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Guillermo Hernandez Rodriguez, Antoine Beylot, Jacques Villeneuve. A numerical approach for compiling full Physical Supply-Use Tables (PSUTs) under conflicting information. 12° WORKSHOP APDR | INPUT-OUTPUT MODELS, Feb 2012, Leiria, Portugal. pp.ID 1009,, 2012. 〈hal-00667407〉

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