Mathematical Problems in Engineering / 2017 / Article / Tab 2 / Research Article
Operational and Environmental Efficiencies of Japanese Electric Power Companies from 2003 to 2015: Influence of Market Reform and Fukushima Nuclear Power Accident Table 2 Results of environmental efficiency for nine electric power companies.
ā Hokkaido Tohoku Tokyo Chubu Hokuriku Kansai Chugoku Shikoku Kyushu EEV: model (1 ) environmental efficiency (VRTS) 2003 0.768 1.000 1.000 1.000 1.000 1.000 0.642 1.000 1.000 2004 0.783 0.819 1.000 0.934 1.000 0.908 0.644 1.000 1.000 2005 0.838 0.774 1.000 1.000 1.000 1.000 0.649 0.959 1.000 2006 0.826 0.830 1.000 1.000 0.908 1.000 0.645 0.998 1.000 2007 0.802 0.788 1.000 1.000 1.000 0.937 0.641 0.988 1.000 2008 0.697 1.000 1.000 0.837 0.850 1.000 0.624 1.000 0.909 2009 0.910 0.815 1.000 0.854 1.000 1.000 0.628 0.952 1.000 2010 1.000 0.877 1.000 1.000 1.000 1.000 0.590 1.000 1.000 2011 1.000 1.000 1.000 1.000 0.792 1.000 0.646 0.751 1.000 2012 0.749 0.749 1.000 1.000 1.000 0.910 0.629 1.000 0.823 2013 1.000 0.889 1.000 0.939 0.761 0.798 0.608 0.737 0.709 2014 0.837 1.000 1.000 0.949 0.712 1.000 0.645 1.000 0.851 2015 1.000 1.000 0.978 0.873 0.641 1.000 0.667 1.000 1.000 Average 0.862 0.888 0.998 0.953 0.897 0.966 0.635 0.953 0.946 EEC: model (1 ) environmental efficiency (CRTS) 2003 0.713 0.874 0.760 0.856 1.000 1.000 0.621 1.000 0.919 2004 0.705 0.811 0.844 0.879 0.924 0.892 0.623 0.944 1.000 2005 0.730 0.767 0.843 1.000 1.000 0.950 0.633 0.900 1.000 2006 0.719 0.828 0.895 0.920 0.873 0.969 0.633 0.946 1.000 2007 0.713 0.782 0.842 0.835 1.000 0.907 0.633 0.987 1.000 2008 0.667 0.944 0.916 0.837 0.838 1.000 0.615 1.000 0.897 2009 0.789 0.807 0.874 0.853 0.929 1.000 0.607 0.908 1.000 2010 0.904 0.869 1.000 1.000 0.861 1.000 0.571 0.949 1.000 2011 0.812 1.000 1.000 0.970 0.652 1.000 0.637 0.715 1.000 2012 0.646 0.743 1.000 1.000 0.728 0.910 0.620 0.661 0.810 2013 1.000 0.853 1.000 0.937 0.660 0.797 0.598 0.703 0.708 2014 0.837 1.000 1.000 0.934 0.650 1.000 0.644 0.731 0.818 2015 1.000 0.982 0.969 0.870 0.608 0.891 0.651 0.798 0.938 Average 0.787 0.866 0.919 0.915 0.825 0.947 0.622 0.865 0.930 SEE: scale efficiency 2003 0.928 0.874 0.760 0.856 1.000 1.000 0.967 1.000 0.919 2004 0.900 0.990 0.844 0.941 0.924 0.983 0.968 0.944 1.000 2005 0.871 0.991 0.843 1.000 1.000 0.950 0.976 0.939 1.000 2006 0.870 0.999 0.895 0.920 0.961 0.969 0.983 0.948 1.000 2007 0.888 0.992 0.842 0.835 1.000 0.968 0.987 0.999 1.000 2008 0.957 0.944 0.916 0.999 0.986 1.000 0.986 1.000 0.987 2009 0.868 0.991 0.874 0.998 0.929 1.000 0.967 0.954 1.000 2010 0.904 0.991 1.000 1.000 0.861 1.000 0.968 0.949 1.000 2011 0.812 1.000 1.000 0.970 0.824 1.000 0.985 0.951 1.000 2012 0.863 0.991 1.000 1.000 0.728 1.000 0.985 0.661 0.985 2013 1.000 0.959 1.000 0.997 0.867 0.998 0.985 0.953 0.999 2014 1.000 1.000 1.000 0.985 0.913 1.000 0.999 0.731 0.961 2015 1.000 0.982 0.991 0.997 0.949 0.891 0.976 0.798 0.938 Average 0.913 0.976 0.920 0.960 0.919 0.981 0.980 0.908 0.984