Research on Safety Input-output Efficiency of Coal Mine Enterprises based on the Four-stage DEA-MALMQUIST Model

Abstract

In order to systematically evaluate the rationality of safety input-output of Chinese coal enterprises, this study analyzed and investigated the safety input-output efficiency of 16 listed coal enterprises in China during the five years from 2017 to 2021. This is achieved through the classification, integration and systematic analysis of the data in the business statements disclosed by enterprises in recent years. Using four-stage DEA model and Mulmquist model, this study has important theoretical and practical significance. The research results show that :1) In general, there are some unreasonable inputs in the operation process of Chinese coal enterprises, which are mainly reflected in the lack of planning of various inputs and the behavior of resource waste. 2) The fundamental problem of unreasonable safety input and output is the waste of human resources. Under the current economic scale, the average overstaffing of the industry reaches 37.56%. In terms of enterprise operating expenses, too many personnel will lead to a further increase in security costs, management costs, scientific research costs and other costs. 3) Before 2019, the operation and development of China's coal enterprises were mainly reflected in that their own technical management level lagged behind the average level of the industry, and after 2019, it was transformed into the insufficient utilization of their own existing management technology level. This paper takes the safety input-output efficiency of Chinese coal enterprises as the starting point, and deeply discusses the rationality of enterprise input and output. This paper studies the influence of different input-output units on the operation efficiency of enterprises, and provides guidance for improving the input management level of enterprises.