When there is a continued increase in output of goods and services, be it total or per capita, there is economic growth. In the same vein, economic growth means additional earnings of the country which could be used for public services and additional earnings of its citizens (Nissan, Edward, Niroomand, Farhang 2012). Smith (cited in Nissan, Edward, Niroomand, Farhang, 2012) presented two growth themes namely classical sectoral analysis and classical aggregate growth. he defines classical sectoral as a performance of individual industries and their contribution to the growth process while the classical aggravate growth “provides explicitly the growth path subject to technical change due to division of labor”(website). Smith also said that technical, scientific and commercial specialization occurred as a result of a division of labor (Smith 1776).