Abstract
In order to study port logistics policies’ impact on related entities of port logistics, this paper try to use difference-in-difference model (DID model) in port logistics policy evaluation. Reviews related port logistics policies announced recent years in China, evaluates the policies impact on public port enterprises, and demonstrates the feasibility of using DID model to evaluate the port logistics policies. Based on whether a public port enterprises develop port logistics business, defines the public port enterprises which develop port logistics business as the experimental group, others as the control group, and establishes DID mo del and evaluates the policy influence. Evaluation results show that the port logistics policies have a negative impact on t he gross profit of the experimental group, and DID model can be used in port logistics policies evaluation. Perhaps the strengthening of infrastructure construction, diversification and expansion of development channels enhance the operating costs of port enterprises in short-term and result in short-term earnings decline.
Highlights
During mo re than 30 years of Ch inese Reform and Opening-up, the development of port logistics has gained great achievements
The port enterprises are facing the same macro policy environ ment and the economic environ ment, and the important business indicators of the port enterprises are relatively stable. We can make such a treatment for the port logistics policy set: the nine listed port enterprises engaged in the port logistics business can be regarded as experimental group wh ich affected by the port logistics policy set, and the other seven port companies can be regarded as control g roup
The parameter policy × year characterized the policy effect has a value of -9.055916, which shows that the port logistics policy has a negative impact on the gross profit of port enterprises of the experimental group which carry out port logistics business and regard the port logistics sector as a separate module
Summary
During mo re than 30 years of Ch inese Reform and Opening-up, the development of port logistics has gained great achievements. This paper attempts to analyze the impact of port logistics policies on port logistics enterprises by using DID model. It is of great significance to explore the establishment of an objective and quantitative study tool for evaluating port logistics policies, and on the other hand, it has important guiding significance to improve the imp lementation of port logistics policies. In terms of DID model, it has been applied to evaluate the policies impacting on fields of the med ical and health care[9], the rural tax and fee refo rm[10, 11], the real estate policy reform[12] and many others, since Zhou Li'an first introduced the DID method in 2005. There is no research on the port logistics policies evaluation on the real economy by the application of DID model
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