مطالب

This study examines the effect of Iranian oil sanctions on the International oil market network for the first time with Complex Network Analysis (CAN) with Diebold -Yilmaz and Arch indexes from 1991:01 to 2019:12. The analysis was performed for two periods before and after the sanctions, and the results were compared. Results showed that the Iranian oil market in both networks before and after the sanction is one of the influential nodes in the oil network. The volatility spillover of the Iranian oil market in the oil network market has increased after the sanctions. Also, on Iranian oil, volatility spillover from other oil markets has to Iran increased after the sanction. But overall, the sanction has not had a significant impact on the oil market network. The Iranian oil market volatility was receiver before the sanction in the network, but its role changed after the sanction, and it became a sender node.

Having a strong and capable crew is one of the primary desires of any organization. The organization’s prosperity depends on such individuals, and according to the resource-based approach, organizations with talented human resources have a competitive advantage because the possibility of imitating and copying such forces is zero for a competitor. Today the demand for talent is increasing. Organizations compete to obtain such resources and spend much money attracting and hiring them. A successful organization can identify and maintain talent using appropriate human resources systems. Value-based organization models are effective systems of talent management that have entered the talent management literature. This paper aims to review the literature related to the model of value-based organization with an emphasis on talent management in the National Iranian Gas Company. This is descriptive cross-sectional research that is practical in purpose and has a quantitative nature. The data analysis showed that organizational, group, spiritual, psychological, and social ethics should be prioritized to achieve improved talent management, individual values, and professionals. Paying attention to the values of talent and institutionalizing essential values, such as challenging work, continuous learning, maintaining self-esteem, and giving them independence and freedom, should be among the priorities of the National Iranian Gas Company

The aim of this research was to determine the relationship among transformational leadership style with organizational culture and organizational commitment. The population consists of 745 the employees of the Ministry of Youth and Sports of Iran. The sample size of 256 staffs was determined using stratified random sampling. In order to collect the needed data, three Transformational Leadership, Organizational Culture and Organizational Commitment Questionnaires were used. The validity of these questionnaires was confirmed by foreign and domestic researches. Cronbach's alpha reliability test of transformational leadership, organizational culture and organizational commitment were respectively 0.97, 0.97, and 0.92. In addition, data were analyzed using statistical tests such as descriptive statistics, Kolmogorov Smirnoff, Pearson correlation coefficients using SPSS Software. The findings of this study showed that there was a positive and significant relationship between transformational leadership and organizational culture (p≤0.01, r= 0.80). Besides, there was a positive and significant relationship between transformational leadership and organizational commitment (p≤0.01, r= 0.46), too. Likewise, there was a positive and significant relationship between organizational culture and organizational commitment (p≤0.01, r= 0.57). However, organizational culture is stronger predictor than transformational leadership for organizational commitment. Finally, in accordance with the responses of staffs of the Ministry of Youth and Sports, it can be said that if leaders create an organizational culture in which creativity and satisfaction were high as well as to taking advantage the organizational rewards and job good conditions, employees would be able to stimulate higher levels of organizational commitment.