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Business environment has a significant impact on performance of all enterprises, and thus affects economic development. According to the view of the majority of economic experts, Iran's business environment is not in a good condition. Most of actions for its improvement are implemented without considering their components interactions and hence no success is achieved.Therefore,before any action, it is crucial that the components of business environement should be identified.The aim of this research is vast analysis of business environment elements and their interaction, Hence the context and business environement improvement is obtained. This research has identified 481 components of the business environment by examining 1751 international and domestic researches. Interpetive- Structural Modeling as a tool of soft operation reseach (OR), makes people and groups map the complex relationships among many elements in a complex decision making situation. In this research, by using Interpretive Structural Modeling we analysed intensity of influence, effects, direct and indirect effects and their dependency. The results of the research show that, the most influential component of business environment is legal environment. Hence, for improvement of legal environment and consequently Iran's business environement patology and procedures of law making are mostly important duty of policy makers.

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One of the most important issues in economics is to explain the considerable differences among nations in context of economic growth and well-being. In the recent decades, a consensus among economists suggests that institutions are the main reason for mentioned differences.  If this is the case, immediately a question arises: which institutions are of the most importance in the growth and development process? So far, various classifications of institutions discuss on roles of them on economic performance. Rodrik (2005) classify institutions into four various categories; market creating institutions, market regulating institutions, market stabilizing institutions, and market legitimizing institutions. In this paper, we estimate the effect of these institutions on development by using dynamic GMM panel data method for the periods 1980-2009 and 1995-2009. The results suggest that market creating institutions and market stabilizing institutions are affecting per capita GDP, but the other institutions have no significant impact on global economic growth.