عنوان مقاله [English]
Increasing final demand in the economy is one of the variables affecting production and value-added growth. Accordingly, the purpose of this study is to investigate the effect of final demand components on changes of value-added with emphasis on the role of exports between 2011 and 2016 using the Structural Decomposition Analysis (SDA) approach in the input-output model. The statistical bases of this study are two input-output tables of 2011 and 2016. The results of the model showed that the change in the structure of exports (with the volume of exports being constant) between the two years under study has increased the value added of the whole economy by 73662.31 billion Rials. The decrease in the volume of exports between the two years has also reduced the added value of the whole economy by 12443.2 billion Rials. The most positive effect of restructuring belonged to the three sectors of "transportation and communications", "wholesale and retail" and "water, electricity and gas". The value- added of these three sectors due to this factor has increased 92481.94, 88672.52 and 45720.77 billion Rials, respectively. On the other hand, the value-added of the two sectors "crude oil and natural gas" and "chemical, rubber and plastics" have the greatest negative effect of the restructuring of exports. The value- added of these sectors due to this factor has decreased by 260550.29 and 12312.67 billion Rials, respectively.