Abstract
The main purpose of this paper is to examine the economic effects of seaports infrastructure investment (SIT) on Tunisia's economic sectors (i.e., manufacturing, agriculture, and services) from 1983 to 2011. Based on the production function approach, we assumed that there are three types of production factors: capital stock, labor force, and seaports capital stock. The functional form of the Cobb -Douglass production function is used in this study. Empirical results confirm the existence of the positive economic effects of the seaports' investments in Tunisia's economic growth. They also show an unequal distribution of the positive economic effects regarding the country's economic sectors. In addition, they revealed that SII seems to be even more beneficial to the services sector than the manufacturing sector. These results are very important for decision makers for developing a policy for the seaports and avoiding the unequal distribution of the economic benefits between the country's economic sectors.