Abstract
The estimation of the economic benefits of a public investment project should include not only the direct effects but also the indirect ones. The problem is seen even more clearly when considering projects involve investments for increasing assets in social overhead capital, such as roads, railways, ports, etc. These projects often show a direct benefits only, which may be less than unity if the services produced are not sold, but consideration of the benefits deriving from the execution of such projects often shows that they are of top priority. In these cases the most important benefits are indirect, since they make production possible in other sectors of the economy.
In this drafting, we deal with an estimation of direct and indirect economic benefits to a region which derived from the public investment for port facilities, by preparing a simplified system as shown in Fig. 1.
Thereupon, such economic benefits are defined as an increment of the net regional products. Then the econometric model and interregional input-output model are introduced to analyze each process of this system mentioned above.
