EFFICIENCY EVALUATION OF PORTS IN BOHAI RIM REGION BASED ON THREE-STAGE DEA

As an important window of domestic and foreign trade, port is an important economic resource of a country or region. Based on the background of the new economic normal, exploring port efficiency plays an important role in building a new system of open economy in China. Therefore, this paper uses the three-stage DEA method to make an empirical study on the efficiency of ports in the Bohai Rim region. In the first stage, use the traditional data envelopment analysis (DEA) model to measure efficiency; in the second stage, use the results of the SFA regression model to adjust so that all research objects are in a homogeneous environment; in the third stage, apply the adjustment results of the second-stage investment indicators, and again apply the traditional DEA model to measuring the efficiency to obtain the relative efficiency value excluding the influence of environmental factors and random errors. The results show that the overall level of port efficiency in the Bohai Rim region is relatively high, in which Qingdao Port is always at the forefront of technology. Finally, according to the comparison of the efficiency value of the first stage and the third stage, this paper puts forward some suggestions to improve the port efficiency.