One of the most influential of the national economic indicators is gross domestic product, But since this measure does not consider the costs of eliminating pollution and the negative effects of environmental, has been criticized. In the other word, GDP is not an appropriate criteria for measuring economic welfare, so green GDP has been introduced for measuring of economic welfare. Major objective of green GDP is the accounting systems that are provided an exact and correct criteria of economic welfare. In this paper, to assess the impact of Trade Liberalization on green GDP, we used the Autoregressive Distributed Lag approach and time series data over the period 1357-1388. The results of estimating model show that increased Trade Liberalization leads to an increase in green GDP, So that elasticity of green GDP to the Trade Liberalization in the long term and short term respectively is 0.082 and 0.044.

The present research studies the relationship between commercial policies and economic growth in Iran that is based on Locuas (1988) model of endogenous growth. To avoid of spurious regression the Johansons model are used. The empirical results indicate that there is cointegration balance relation between function of economic growth and its determined elements such as capital, labor force, human power, real export sand tariff import rate.To reach the short time dynamic internal and external models, two model tools of error correction and ( VDC s)1 and (IRFs)2 are used The obtained results of (VECM )3 show that there is causative function from variables in the right side of the model towards variable of local gross domestic production. In other word, it indicates innateness of dependant variable. From the other point of view, the documents resulted from (VDS s) state that real export variable tariff and human power have determined function in explaining (GNP) production. The (IRF s ) result also indicates that there is a convergence in long balance relationship.

Introduction: Globalization is an inevitable process that one of its consequences is the Liberalization of Trade and the reduction of protectionism. Trade Liberalization causing the heavily interdependent economics of the countries around the world to reduce customs and Trade barriers to a minimum level, and make financial transfers between countries easily done. Rice is the most important and strategic crop after wheat and plays a significant role in Trade and food security of the world and Iran. Because it provides more than 20% of human total daily calories and Almost two thirds of the world's population depends on rice for food. The total Production of Rice in Iran during 2012-2013 was about 2. 3 million ton and about 93% of rice products are yielded in Gilan, Mazandaran, Khuzestan, Golestan and Fars provinces. About 88% of total production of rice in Iran is allocated to domestic consumption while just 12% of goes to the world market. Total consumption of rice in Iran is about 3. 2 million ton. Materials and Methods: The model that is used in this study is Agricultural sector partial equilibrium model with endogenous prices. The data used in present study are the average of production, consumption, export, import and area under cultivation quantity, which export and import prices for long, medium and short grain rice and import tariffs for two growing years of 2011-12 and 2012-13 are considered. These inFormation are provided from agriculture jihad organization of Iran, Customs Office of the Islamic Republic of Iran and the book of export-import regulations. In current research, at first simple linear demand function is calibrated for long, medium and short grain rice based on demand price elasticity. The supply function involves two parts: domestic supply function and export supply function. The calibration of domestic supply is done by a Maximum Entropy integrated PMP method and calibration of export supply function is based on export supply price elasticity. It should be noted that the demand elasticities used in current study are captured from various studies and the export supply elasticities are taken as unity following Aydı n et al (2004). Constraints that are used in the model are comprised of the constraints of area under cultivations, water, chemical fertilizer, variable costs, constraint of commodity balance and constraints of calibration includes area under cultivation and export. Results and Discussion: The investigated scenarios are the reduction of import tariffs for rice by 10, 25, 50, 75, 90 and 100 percent. The results of present study showed that The area under cultivation of long and medium grain rice, compared to the base year (2012 and 2013 will decrease about 0. 61 and 3. 38 percent), in Mazandaran province, about 0. 49 and 9. 18 percent in Gilan province, about 2. 82 and 4. 32 percent in Golestan province, about 90 and 0. 6 percent in Khuzestan province and about 24. 47 and 2. 47 in Fars province t. Short grain rice in Golestan province will decrease about 22. 93 percent and in Fars province will decrease about 43. 33 percent. Generally, with decreasing tariff rates, the long, medium and short grain rice, compared to the base year (2012 and 2013), will decrease about 21. 5, 4 and 11. 5 percent, respectively. Also, the consumption of long, medium and short grain rice will increase by 0. 5, 1. 1 and 0. 7 percent, respectively. The average import of long, medium and short grain rice will increase by 5, 11 and 33. 5 percent, respectively and Exports of long, medium and short grain rice also will increase by about 7. 7%, 11. 7% and 11. 43% as a result of tariff cuts. Also, the net social welfare due to the reduction of rice tariff rates relative to the base year, will increase about 0. 2 percent. The average welfare of consumers will increase about 1% and the welfare of producers will decrease about 1. 7 percent compared to the base year. Also the welfare of the state will increase about 9. 5 percent compared to the base year. Conclusions: Considering small cultivated pieces of land, the high cost of production, the lack of relative advantage in the production of some types of rice and also the high waste of factories in the country, Trade Liberalization can be fruitful. Considering the importance of product advantages in producing, exporting and importing as well the best quality of Iranian rice, creating new technologies and new planting methods such as hydroponic cultivation, which leads to increased perFormance and increased water productivity per unit area, and also planting kinds of rice which have advantages in each province would conclude increasing the welfare of rice producers.

The effects of Trade Liberalization on the agricultural sector's Trade balance of Iran using ARDL model has been surveyed in this study during the period 1982-2012. Based on the results, variables of value-added agriculture, import price index, and currency have a significant and positive relationship with the agricultural sector's Trade balance in short and long-term. Variables of earnings of oil sector and export price index are significant in the short term, but in the long run its coefficient is not significant. Also, agricultural Trade Liberalization index has a negative and significant effect on agricultural sector's Trade balance of Iran in short and long run. Coefficient of the error correction model show that 60% of the imbalance disappear in each period. According to the results, Trade Liberalization led to worsening the agricultural sector's Trade balance. So, it is essential that Trade Liberalization policy is implementing cautiously and policies with respect to global conditions and advantages of the agriculture sector is making and the maximum capacity of the agricultural sector was used in order to optimize the use of production resources.

This article aims to investigate the impacts of Trade Liberalization on export and import of industrial commodities through estimating of substitution elasticity of industrial commodities, in terms of two digits codes, in global markets; and also estimating of Trade Liberalization impact on export and import of industrial commodities using dummy variable. Our estimations show that average tariff dose not effect export; the relationship between per capita capital and export is negative; elasticity of export to Liberalization is 1.36 and elasticity of export to real exchange rate is less than unit. Substitution elasticities all, except code of 37, are less than unit. Codes of 32, 37, 31, 36 and 35 have the highest export, and code of 33 has the least export.On the side of import, the estimations are as follow: Trade Liberalization has negative impact on import and results of substitution elasticites are mixed. In codes of 34, 31, 32 and 35 the estimated elasticities are not significant. In codes of 38, 36, 33 and 39 the substitution elasticity is negative and in code of 37 is positive. In general, the impact of Trade Liberalization on export is more than import sector. The results show that this policy has positive impact on productivity and at the same time there is a negative relationship between capital accumulation and export; and a positive relationship between capital accumulation and import. This means Iran according to Hecher- Ohlin theory has advantage in labor intensive commodities.

In this study the goal is considering eventual effects of agriculture Trade Liberalization on Iran pistachio by using of a two part model in simultaneous equations system frame on mechanism of pistachio price in global market and it's connection with Iran internal pistachio market. In first part of this model pistachio global demand and supply equations in international market have been estimated. Second part of model includes internal demand and supply equations and Iran pistachio export demand and supply. Global model has been entered as an effective parameter in these functions for considering the results of different policies on Iran's internal and international markets. The results of estimating global demand and supply equations and export demand and supply show that world export supply has a high price elasticity and domestic price is highly influenced by world price and exchange rate.