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This paper studies the operation efficiency of the provincial power grid enterprises of China based on a nonparametric meta-frontier approach. We divide 25 Chinese provincial power grid enterprises into six groups as North, East and Central China, Northeast, Northwest and Southwest regions. The meta-frontier data envelopment analysis (DEA) method is applied to measure the efficiency and decompose the inefficiency of 25 provincial grid enterprises from 2016 to 2019. We find that: (1) the average efficiency values of the 25 enterprises, under the meta-frontier and group frontiers during the observation period, are 0.6900 and 0.9106, respectively. And none of the efficiency values under the meta-frontier exceeds that under the group frontiers. (2) Technology gap inefficiency (TGI) of provincial grid enterprises varies significantly across regions. The TGR of the Northwest exceeding that of other regions during the observation period. (3) The operational efficiency losses of provincial grid enterprises in Northeast, Central and Southwest China mainly stem from technology gaps. Most of the operational efficiency losses of grid enterprises in East China and Northwest stem from corporate mismanagement, while provincial power grid enterprises in North China are inefficient due to both technology gaps and ineffective management. Finally, we propose the suggestions based on these findings.
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