Waste input-output material flow analysis of metals in the japanese economy

Shinichiro Nakamura, Kenichi Nakajima

研究成果: Article

53 引用 (Scopus)

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This paper develops a theoretical model of material How analysis (MFA) within the framework of the Waste Input-Output model (WIO) (Nakamura and Kondo). The model is developed based on two fundamental ingredients: yield ratios and the degree of fabrication. In manufacturing process, multiplication of physical inputs by the yield ratios gives the portion that enters physical outputs, with the rest being discarded as process waste without entering outputs. In input-output analysis, the degree of fabrication can be visualised as triangularity of the input coefficients matrix (goods of lower degree of fabrication ran enter those of higher fabrication, but the reverse does not hold), which is known to emerge through an appropriate reordering of sectors. Application to the Japanese IO data indicates that the model can provide accurate estimates of the weight as well as the composition of metals (Fe. Cu, Pb, Zn, and Al) used in a passenger car. The model is also used to estimate the major final use categories (household consumption, public consumption, capital investment, inventory investment, and export) of metals.

元の言語English
ページ(範囲)2550-2553
ページ数4
ジャーナルMaterials Transactions
46
発行部数12
DOI
出版物ステータスPublished - 2005 12 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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