According to the results of the management evaluation of the nation’s public firms over the past seven years, the rating of the port corporation is generally insufficient. According to the results of the seven-year study 2011-2017, the average debt ratio of the port corporation was 34.5%, two to three times lower than that of the general public company, the operating profit ratio of sales was three times higher, and the value added per person was 1.6-1.9 times better. However, the aggregate score and grade were generally low, with 4.1% of the total number of employees of the general public corporation, 10% of the average total assets, and 1% of the average sales volume. The distributed analysis results and panel return analysis results show that the size significantly impacts the overall score and grade. Additionally, major business standards such as port volume, not controlled by the port corporation, appear to have a decisive influence on the low grade of the port corporation. Thus, it appears that improvement and supplementation of key business indicators of port construction are urgently needed in the management evaluation system, which can be properly controlled.

Abstract
1. Introduction
2. Theoretical Background
3. Size․Financial rate of PA
    3.1 Comparison of Size between PA and Publicfirm
    3.2 Comparison of Financial rate between PA andPublic firm
4. Research Methodology and Analysis
    4.1 Research Model and Variables
    4.2 Research Hypothesis and analysis method
    4.3 Statistics․T-test․ANONA results
    4.4 Panel Regression Analysis results
    4.5 Hypothesis test results
5. Summary and Conclusion
References

• Sung-Yhun Lee(School of Port and Logistics, Kaya University)
• Ki-Myung Ahn(Division of Shipping Management, Korea Maritime and Ocean University) Corresponding author