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Productivity, illustrates the relationship between the quantity of produced goods and services , output, and the quantity of labor, capital, land, energy, and other resources that produced it, the input, is a key element in analyzing an economy, for it illustrates both the efficiency of industry and the wealth-generating capability of the economy. However, this paper computes key industries to promote overall labor productivity in Iran by xiaoming,1998 method. In this study, we use the Input-Output tables of Iran for the years1984,1988,1993,1999 and 2005.We found that paper industry and water, electricity and Gas and financial sectors are key sectors or productivity incentives sectors in Iranian economy.

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In the energy economics literature, one of the most important approaches to managing energy demand is to improve energy efficiency, which is associated with a concept called a rebound effect. The rebound effect causes the energy saving (due to improved efficiency) to be less than expected. Considering the importance of using oil products in the Iranian economy, the present paper tries to track the factors affecting the rebound of petroleum products (gasoline, gas oil and other products) by applying a 5% shock to improving their efficiency and quantitatively, for this purpose, the analysis of the rebound effect at two macro levels and a part is done in two steps in the form of a computable general equilibrium model. The results of this paper, indicate that among the oil products, improvement of the efficiency of "other oil products" has the least effect on the economy-wide rebound effect, and improving the efficiency of gasoil has the highest economy-wide rebound effect. The results of the decomposition of the rebound effect at the macro level are those of the manufacturing sector, which are the major consumers of oil products (a larger share of the total energy consumption of production), the main factors in the formation of the rebound effect, so that in the case of gasoline, the "road transport" section accounts for 35.2 percent of the economy-wide rebound effect. In the final demand side, urban households account for 20% of the economy-wide rebound effect. The decomposition of the rebound effect at sector level also indicates the domination of the mechanism of substitution effect on output effect in the formation of the rebound effect.