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Regional policy requires the use of a suitable economic model. One of the common patterns in this field is the multi-region input-output model in which the national economy is subdivided into regions with different comparative advantages and on the basis of specific policies. Multi-regional input-output data preparation in Iran has always been one of the main challenges in using them to measure the impact of policymaking in regions. In this study, in order to overcome the above challenge, the hybrid Location Quotient - Gravity method is introduced for the first time in Iran and has been empirically prepared for three regions of Iran. In hybrid Location Quotient - Gravity Method for Providing trade data between regions, utilizes the most space-economy factors (supplier size, demand size, total economy size, and distance) simultaneously. In the Experimental section, in order to operate the above method are used the National Input -output Table of 2011 and the statistics of regional accounts of provinces that are divided into three regions: Tehran, oil-rich regions (including Khuzestan, Bushehr, Ilam, Kohkiloyeh and Boyer-Ahmad and Trans-region) and have been calculated using three regional data-output coefficients. The results show that coefficients are different in the three study areas. Meanwhile, Tehran province has the most spillover effects among the study areas and the rest economy has the most coefficient.

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One way to achieve economic growth is to invest in leading sectors. In addition, economic sectors can stimulate economic growth in other regions through the effects of spillover and feedback on their output. The purpose of this study is to identify the leading sectors, the effects of spillover and feedback on Oil-rich region. For this purpose, the two-region input-output table of Iran's oil-rich regions and the rest national economy are used. The results of the research show that in the oil-rich regions, from the demand side, the highest Output Multipliers is devoted to the production of rubber, plastics and petrochemicals. From the supply side, the sectors of wood and paper manufacturing, distribution of natural gas, manufacturing of metals and other mines have the highest Output Multipliers. And the average of spillover effects of oil-regions is 0.09 and other national economy is 0.05 due to the larger The rest national economy. The results show that agriculture, metal construction and transportation, warehousing and communications are leading Sector in oil-rich areas and The rest national economy. The petrochemical sector is only a leading Sector in oil-rich areas, however crude oil and natural gas are not leading Sector in either region. Therefore, expansion of downstream industries of crude oil and natural gas in oil-rich areas is recommended.

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Financial intermediation plays a significant role in the economic growth and development of a country. The purpose of this research is to investigate the role of the financial intermediation sector in production and employment, considering Iran's double-digit unemployment rate and negative economic growth rate, using the country's latest data-output table. Hence, the expanding extraction method of Diazenbacher and Lehr (2013) is used.The results of the study demonstrate that if 10% of the output of the financial intermediation sector is removed, the total output of the economy will decrease by 31188388 million Rials (31.1%). In addition, this elimination has the greatest impact on the financial intermediation and transportation sectors. Also, the 10% reduction in the supply of the financial intermediation sector will have the highest reduction in the value-added percentage on the agriculture, industry and construction sectors. In addition, the removal of 10% of the financial intermediation sector will reduce the employment of the entire economy by 49,972 people (12.3%). Considering that the agricultural and fishing sectors, industry, construction and wholesale and retail services are considered key from the perspective of production and employment, and also there is a high correlation coefficient between the decrease in output and the decrease in employment between economic sectors, it can be said that growth-oriented policies and job-creating policies are in the same direction in Iran's economy are in the same direction. Therefore, it is suggested that economic policy makers should improve employment by adopting a growth-oriented policy. In this article, the 99-sector data-output table of 2011 (which was published by the Central Bank in March 2017) has been used as a section by section. Then, the above table is aggregated into 15 sections and it has been used after separating imports