Comparative Study on Energy Utilization Efficiency of High-tech Enterprises in Beijing-Tianjin-Hebei and Yangtze River Delta

Using panel data from the Beijing-Tianjin-Hebei and Yangtze River Delta regions from 2014 to 2018, combined with the DEA model and the Malmquist index method, the energy efficiency of high-tech enterprises and their decomposition items are compared from both static and dynamic aspects. The results show that the overall energy utilization efficiency of the two places is in a state of continuous improvement. From 2014 to 2016, the efficiency of high-tech enterprises in the Beijing-Tianjin-Hebei region was better than that of the Yangtze River Delta region, but it was overtaken by the Yangtze River Delta region from 2017 to 2018. In contrast, the advantage of the Beijing-Tianjin-Hebei region lies in pure technical efficiency, and the advantage of the Yangtze River Delta region lies in scale efficiency