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According to the political economy literature, a country's political and economic structures have close, and also complex relationship with each other. Therefore political structure of the country is known to be the leader system of economic management that reflects regime's economic ideologies. Hence any disorder in the political system, especially in developing countries, could lead to economic instability and disrupts normal flow of the economy which will result in slower economic growth as the most important indicator of economic performance. This study tries to analyze effect of political instability on Iran's economic growth by using political and social Time Series data during period 1339-1388. For this purpose, effect of political instability on economic growth based on formal political instability and informal political instability indexes has been tested by using APARCH technique. Empirical findings of this study indicate that variables related to the both mentioned indexes have a negative effect on economic growth

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In this article, using Iran's Manufacturing Data during (1979-2007), we try to measure the degree of monopoly power and agreement (Collusion) in Automotive and Textile Industries. The strategic nature is the main reason to study these two industries. The study employs Conjectural Variation and Agreement Approach to evaluate monopoly power. Using SUR approach, we estimate cost function and input demands simultaneously. The results of this study indicate mutual interdependence between firms and also high degree of Agreement and high monopoly power in automotive Industry, while the degree of Agreement in Textile Industry is low

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.Despite the importance of banks they are extremely vulnerable in times of liquidity shortage, which causes withdrawal of bank and bank bankruptcies, because there are assets with low liquidity and much more debts with high liquidity. The liquidity risk in normal times does not cause a lot of problems for banks and could be solved by financeing through bonds issuance. But during economic crisis special conditions, it creates some problems for banks which called "bank run”. The sudden withdrawal of deposits and sudden drop in banks' credit resources would lead to liquidity shocks and have a negative effect on banking stability soundness and on lending ability of banks. The purpose of this paper is to propose a model that allows policy-makers to consider the probability of bank run. So in order to do this, the panel logit method has been used. The results of the study indicate the importance and effect of the banking soundness and deposit substitute variables such as exchange rate on possibility of sudden withdrawal of deposits.