DEA efficiency | Characteristics of efficiency values | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
Comprehensive technical efficiency (TE) | Average value | 0.801 | 0.796 | 0.789 | 0.792 | 0.787 | 0.783 | 0.781 | 0.775 | 0.769 | 0.765 | 0.771 |
TE = 1 Number of cities | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | |
Pure Technical Efficiency (PTE) | Average value | 0.928 | 0.928 | 0.928 | 0.927 | 0.918 | 0.915 | 0.918 | 0.923 | 0.931 | 0.936 | 0.941 |
PTE = 1 Number of cities | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | |
Scale Efficiency (SE) | Average value | 0.863 | 0.858 | 0.852 | 0.856 | 0.857 | 0.855 | 0.851 | 0.840 | 0.829 | 0.821 | 0.823 |
SE = 1 Number of cities | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | |
returns to scale | Progressive increasing | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 |
Progressive decreasing | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 3 | |
Unchanged | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 |