Mathematical Problems in Engineering / 2017 / Article / Tab 3 / 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 3 Results of operational efficiency for nine electric power companies.
ā Hokkaido Tohoku Tokyo Chubu Hokuriku Kansai Chugoku Shikoku Kyushu OEV: model (5 ) operational efficiency (VRTS) 2003 1.000 0.952 0.971 1.000 1.000 0.979 0.950 1.000 0.968 2004 1.000 0.911 1.000 1.000 1.000 0.994 0.996 1.000 0.984 2005 0.989 0.936 1.000 1.000 1.000 0.992 0.990 0.952 0.969 2006 1.000 0.950 1.000 1.000 0.994 0.986 1.000 0.976 0.973 2007 1.000 0.949 1.000 1.000 0.979 0.980 1.000 1.000 0.958 2008 0.873 0.936 1.000 0.997 0.980 0.935 0.961 1.000 0.922 2009 0.899 0.912 0.986 0.994 1.000 0.947 0.950 1.000 0.922 2010 0.902 0.922 1.000 1.000 1.000 0.979 0.954 1.000 0.936 2011 0.911 0.751 1.000 0.932 0.956 0.868 0.934 1.000 0.764 2012 0.819 0.812 0.959 0.913 0.920 0.830 0.894 0.939 0.716 2013 0.755 0.935 1.000 0.956 0.885 0.898 0.924 1.000 0.867 2014 0.834 1.000 1.000 1.000 0.896 0.919 0.920 0.994 0.847 2015 0.876 0.979 0.970 1.000 0.855 0.961 0.912 0.978 0.891 Average 0.912 0.919 0.991 0.984 0.959 0.944 0.953 0.988 0.901 OEC: model (5 ) operational efficiency (CRTS) 2003 0.990 0.951 0.903 1.000 1.000 0.965 0.937 0.956 0.967 2004 0.980 0.907 0.938 1.000 1.000 0.987 0.983 0.960 0.982 2005 0.948 0.935 0.959 1.000 1.000 0.982 0.975 0.931 0.964 2006 0.979 0.948 0.969 1.000 0.971 0.976 0.979 0.955 0.963 2007 0.925 0.948 0.903 1.000 0.936 0.969 0.989 1.000 0.947 2008 0.806 0.935 0.916 0.997 0.980 0.913 0.948 1.000 0.918 2009 0.857 0.905 0.909 0.993 0.940 0.938 0.937 0.957 0.917 2010 0.871 0.915 0.885 1.000 0.923 0.965 0.942 0.948 0.928 2011 0.832 0.745 1.000 0.927 0.864 0.822 0.921 0.897 0.761 2012 0.694 0.805 0.866 0.902 0.838 0.781 0.878 0.785 0.706 2013 0.752 0.934 1.000 0.949 0.834 0.866 0.924 0.936 0.864 2014 0.832 1.000 0.957 1.000 0.849 0.880 0.917 0.912 0.844 2015 0.873 0.978 0.942 1.000 0.826 0.949 0.911 0.920 0.890 Average 0.872 0.916 0.934 0.982 0.920 0.923 0.942 0.935 0.896 SOE: scale efficiency 2003 0.990 0.999 0.930 1.000 1.000 0.986 0.987 0.956 0.999 2004 0.980 0.996 0.938 1.000 1.000 0.994 0.987 0.960 0.997 2005 0.958 0.999 0.959 1.000 1.000 0.989 0.984 0.978 0.995 2006 0.979 0.998 0.969 1.000 0.977 0.989 0.979 0.978 0.990 2007 0.925 0.999 0.903 1.000 0.956 0.989 0.989 1.000 0.989 2008 0.924 0.998 0.916 1.000 1.000 0.976 0.986 1.000 0.995 2009 0.953 0.993 0.922 0.999 0.940 0.990 0.987 0.957 0.995 2010 0.965 0.993 0.885 1.000 0.923 0.986 0.988 0.948 0.991 2011 0.913 0.993 1.000 0.995 0.904 0.947 0.986 0.897 0.996 2012 0.847 0.992 0.903 0.988 0.911 0.941 0.982 0.836 0.985 2013 0.997 0.999 1.000 0.993 0.943 0.964 1.000 0.936 0.997 2014 0.998 1.000 0.957 1.000 0.947 0.958 0.997 0.918 0.997 2015 0.996 0.999 0.972 1.000 0.967 0.987 0.999 0.941 1.000 Average 0.956 0.997 0.943 0.998 0.960 0.977 0.988 0.947 0.994