Abstract
This study proposes the application method for evaluating integrated environmentalefficiency using the Data Envelopment Analysis (DEA) and Inverted DEA that can deal with multiple inputs and outputs data. It becomes possible for identifying the optimal strategy for the inefficiency enterprise by using this analysis. We analyze and compare 11 automobile manufacturing companies in Japan for the 5 year period from 2001 to 2005. The dataset consists of total sales as market variable and the amount of chemical substances discharged which are registered in PRTR and the CO2 emissions as environmental variables. We find that most of companies have improved the integrated environmental efficiency year by year. In particular, it is also found that relatively better performance on CO2 emission control leads higher score in integrated environmental efficiency.
