Regarding the statistics related to the years 2005 2010, the annual average of production index in this period, apart from the subsector of textile manufacturing productions and the subsector of oil derivatives, shows increase in other subsectors.
It is important to mention that because the obtained coefficients were not significant in the wood and paper subsector (WPP) and the subsector of FOP, and because of inadequate degree of freedom, these subsectors were excluded from the analysis.
Gamma coefficient in all of the small units of the subsectors (except for the subsector of FOP) and in all of the medium and large units (except for the WPP subsector) is significant, and this indicates the inefficiency in all of the subsectors.
The results obtained for small firms in the subsector of the machinery and metal equipments and objects (MMR) shows that the technical efficiency is fluctuating between 0.1 and 70%% in comparison with metafrontier function.
Considering the analytic results of this research, except for the subsector of food stuff (FDT) and oil and oil derivatives (OCP), generally in other subsectors there is increasing return to scale and the inefficient production existence in this condition seriously originates from doing producing activities under the optimal production scale.
Results for small firms in the subsector of textile and leather products (TSL) reveal that the average of the various estimated technical efficiency for small firms in this subsector is close to each other to some extent, and it indicates the closeness of the technology level used in these groups of firms with the estimated technology for metafrontier function.
Also, in this period, the average change in the labor force using index has decreased in the subsector of tobacco production, spinning products, wood and its products, furniture and other products (FOP), as well as in oil derivatives subsector, but it has increased in other subsectors.
Finding for small firms in the subsector of the oil products and its derivatives (OCP) shows that the average of the estimated technical efficiency of small firms in this subsector is to some extent close to each other, and it indicates the closeness of the technology level used in this group of firms with the estimated technology for metafrontier function.
Growth rate of exports in this period shows increase in all of the subsectors, and the maximum increase of 23.5 % belongs to the subsector of textile manufacturing productions.
The obtained results for small firms in the subsector of mineral products (MP) indicate that the technical efficiency fluctuates between 0.2 and 100%% in comparison with metafrontier function.
Since in the subsector of BMIs the assumption of homogeneity of technology in the studied groups in this subsector was not rejected, so for this subsector the metafrontier function has not been extracted, and therefore, the technical efficiency in comparison with this function and the TGR have not been calculated and investigated.
