PW01 Assessment
Exhibit Hall
8:00 AM - Wednesday
(PW018) Assessment of Eco-efficiency by Input-Output and Data Envelopment Analyses.
Halog, Anthony1, Tahara, Kiyotaka2, Sagisaka, Masayuki3, Inaba, Atsushi4, 1 LCA Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan2 LCA Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan3 LCA Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan4 LCA Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
ABSTRACT- Eco-efficiency links the goals of business excellence and environmental excellence, by creating the bridge through which corporate behavior can support sustainable development. The definition of eco-efficiency is explored in Japanese economic sectors and how it could be possibly expressed and calculated. This study aims to develop a quantitative-based methodology that could aid in determining eco-efficiency indices and serve as guide in improving environmental performance. Secondly, it also attempts to find a suitable expression to relate and describe the environmental and economic performance. Eco-efficiency indicators have been defined as analytical tools that allow comparison of various sectors or industries, firms in industry, with each other and with respect to certain environmental characteristics. Based on the theory of multi-factor productive efficiency, three categories of factors are considered, i.e. inputs, desirable outputs and pollutants or wastes. Aside from input-output analysis, non-parametric eco-efficiency mathematical model with the use of data envelopment analysis (DEA) is derived to calculate the relative eco-efficiencies of different economic sectors in Japan. DEA is a linear programming technique for organizing and analyzing data and for identifying best practice frontiers. An eco-efficient frontier, in the case of Japanese economy, has been theoretically established which consists of relatively eco-efficient sectors. This frontier also provides relative projections of achievable targets for the inefficient sectors and what possible improvements in their inputs, desirable and undesirable outputs could be made to increase their sectoral relative eco-efficiencies.
Key words: Data Envelopment Analysis, Green Productivity, Sustainability, Eco-efficiency