The Waste Input‐Output Approach to Materials Flow Analysis

14 Pages Posted: 6 Feb 2017

See all articles by Shinichiro Nakamura

Shinichiro Nakamura

Waseda University - Graduate School of Economics

Kenichi Nakajima

National Institute for Environmental Studies

Yasushi Kondo

Toyama University; Waseda University - School of Political Science and Economics

Tetsuya Nagasaka

Tohoku University - Graduate School of Engineering

Date Written: October 2007

Abstract

A general analytical model of materials flow analysis (MFA) incorporating physical waste input‐output is proposed that is fully consistent with the mass balance principle. Exploiting the triangular nature of the matrix of input coefficients, which is obtained by rearranging the ordering of sectors according to degrees of fabrication, the material composition matrix is derived, which gives the material composition of products. A formal mathematical definition of materials (or the objects, the flow of which is to be accounted for by MFA) is also introduced, which excludes the occurrence of double accounting in economy‐wide MFAs involving diverse inputs. By using the model, monetary input‐output (IO) tables can easily be converted into a physical material flow account (or physical input‐output tables [PIOT]) of an arbitrary number of materials, and the material composition of a product can be decomposed into its input origin. The first point represents substantial saving in the otherwise prohibitive cost that is associated with independent compilation of PIOT. The proposed methodology is applied to Japanese IO data for the flow of 11 base metals and their scrap (available as e‐supplement on the JIE Web site).

Keywords: double counting, industrial ecology, input‐output analysis, material composition, physical input‐output tables (PIOT), triangularity

Suggested Citation

Nakamura, Shinichiro and Nakajima, Kenichi and Kondo, Yasushi and Nagasaka, Tetsuya, The Waste Input‐Output Approach to Materials Flow Analysis (October 2007). Journal of Industrial Ecology, Vol. 11, Issue 4, pp. 50-63, 2007, Available at SSRN: https://ssrn.com/abstract=2911971 or http://dx.doi.org/10.1162/jiec.2007.1290

Shinichiro Nakamura (Contact Author)

Waseda University - Graduate School of Economics ( email )

1-6-1 Nishi-waseda, Shinjuku-ku
Tokyo
Japan

Kenichi Nakajima

National Institute for Environmental Studies ( email )

16-2 Onogawa
Tsukuba, Ibaraki 305-8506
Japan

Yasushi Kondo

Toyama University ( email )

Faculty of Economics 3190 Gofuku
Toyama, 930-8555
Japan

HOME PAGE: http://www.toyama-u.ac.jp/~ykondo/

Waseda University - School of Political Science and Economics ( email )

1-6-1 Nishi-Waseda
Shinjuku-ku, Tokyo 169-8050, Tokyo 169-8050
Japan

Tetsuya Nagasaka

Tohoku University - Graduate School of Engineering ( email )

Japan

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