Synthetic Economic Evaluation Model for Port Planning, so called Value Added Model, was proposed in the Report of the P.H.R.I., Vol.21, No.2.
　Value added generated by port projects can be classified into three categories and be estimated with three models each other.
(1) The first value added is generated by port investiment (Keynes Effect) which is calculated by using the Input-Output Analysis.
(2) The second value added is produced by port service companies located in or nearby port. This effect can be calculated by the interrelation submodels between
operating incomes and amounts of handling cargo or services associated with port.
(3) The third value added is produced by the indutries whose activities depend on seaborne cargo. Statistcal estimating models are made for this purpose. They are
Cargo Flow Submodel,Interrelation Submodel, and Distribution Submodel.
　Kanazawa Port and Niigata Port are selected for investigation and estimation as the typical ports in Japan.
　This report discusses the following items mainly;
1) Transferbility and Applicability of model to various ports.
2) Validity of calculation methods.
3) Stability of the various coefficients being used in this model.