Today, the positive impact of entrepreneurship in the economy has been globally accepted. Entrepreneurs could provide efficient techniques to face with upcoming economic challenges. In this paper, we first investigate the effect of entrepreneurship on growth of economy over the period 2005- 2011. Then we study the impact of four factors including Gross domestic product per worker, Growth in capital per worker, New firm creation and Technological innovation intensity on economic growth. The proposed model of this paper uses ordinary least square technique to investigate the relationship between four independent variables and economic growth. The results show that gross domestic product per worker is the only variable, which is statistically meaningful when the level of significance is five percent and the impact of other three variables including growth in capital per worker, new firm creation and technological innovation intensity are not statistically meaningful. In other word, as we see a 1% increase in gross domestic product per worker we could expect 8.712% increase in economic growth.

Management is the basis of all necessary changes required for any organization. In order to reach organizational objectives, it is necessary to use human resources as effectively as possible. All management team members need to know about their own thinking as well as their ideas on reaching common objectives with better outcomes. In this paper, we present an empirical investigation to study the relationship between leadership style and perceived organizational effectiveness by directors and managers in organizations. The proposed study distributes a questionnaire consists of 37 questions among some management team of Agricultural ministry in one of the provinces of Iran. The main hypothesis of this survey examines the positive relationship between leadership style and perceived organizational effectiveness. The other hypothesis is associated with the supportive leadership style and perceived organization effectiveness and the third question is associated with democratic leadership style and perceived organization effectiveness. The results of Spearman-Pearson test confirm all three results, which indicate there is a meaningful and positive relationship between leadership style and perceived organizational effectiveness.

Information technology plays an important role in increasing organizational cooperation both inside an organization and among different firms. In fact, may organizations have shared information though the recent advances of information technology and they have been able to increase the performance of their organizations, significantly. In this paper, we present an empirical study to investigate the relationship between e-business and intra and extra organizational cooperation. The results indicate that e-business directly increase intra organizational performance, indirectly increase organizational cooperation. Extra organizational performance directly increase organization performance, inside cooperation also indirectly influence inside cooperation through extra organization cooperation.