On the Impact of Shift-Sharing of Handling Capacity on the Concentration Ratio of Container Port Business

The five port groups in China are investigated to find the concentration ratio of container port business and its development law and the influencing factors. Herfindahl-Hirschman Indexes for each port group are calculated according to the data in the period 2010-2019 and the concentration ratio of container port business in China is analyzed. The percentage of container handling capacity shift is investigated with the shift-sharing model. The research indicates that there is a solid hierarchic structure in container port business; the concentration ratio of the business is low and has been going down year by year; and fierce competition can be seen among the 5 port groups. The change of handling capacity will lead to the change of shift increment and then the concentration ratio of the business.