인천항만지역의 항만투자와 조세변화의 경제적 효과에 관한 연구

Study of the Economic Effects on Reducing Tariff and Increasing Government Expenditure in the Incheon Port

The purpose of this study is to Analyze recent 3 projects by the time-series analysis the effects on Incheon Harbor in Korea during the year of 2012~2016. Using variables are total expenditures of Incheon port, Inhabitants income (GRDP), interest rate, Price Indexes, Total export & import in Incheon, Total export & import in Incheon customs head quarters in terms of value. At first, after unit root test, there isn’t unit root, so analyze the short-run causal relationship between government expenditures, tariff on Incheon customs and the rest variables. After Granger test, we found that the most important significant 6 variables are GRDP, Price Indexes, interest rate, total export & import in Incheon. It was followed by analyzing the VAR model. Through the impulse response function & variance decomposition analysis, it reveals that increasing expenditures in Incheon Port causes a slight increasing interest rate, especially short-run interest rate. Also, Incheon port’s expenditure makes decrease Price Indexes and increase of port inhabitants income, GRDP. In short, it appeared Investment on Incheon Harbor is slightly more effective way to increasing GRDP than decreasing tariff on Incheon Harbor.