نشریه مطالعات مدیریت، اقتصاد و کارآفرینی
سال سوم شماره 1 (بهار 1401)

The main purpose of this study is to investigate the effect of ownership concentration on company performance with respect to the quality of investor support in companies listed on the Tehran Stock Exchange. The statistical sample of the research includes 120 companies listed on the Tehran Stock Exchange during the years 2014 to 2019. The statistical method used to test the hypotheses presented in this research is the "composite data regression model". The research findings show that the concentration of ownership will not significantly increase or decrease the company's performance. Therefore، there is no significant relationship between the concentration of ownership and the performance of companies. On the other hand، it can be seen that the quality of investor support has had a positive and significant effect on the company's performance. Therefore، the concentration of ownership and performance of the company is clearly adjusted to the quality of investor support، so the concentration of ownership of companies in corporate activities and capital distribution in order to invest in business activities، grant facilities، etc. can not affect the company's Tobin Q index. In general، the results show that the theorists of the organization should pay more attention to the power and interests of large shareholders and set up an appropriate oversight mechanism that limits the power of large shareholders.

The purpose of this study is to study the effect of manpower capital on social and commercial entrepreneurship in Tehran Welfare. This research is applied in terms of purpose and descriptive-survey method and its statistical population is Tehran Welfare Organization. The number of the statistical population is 800 and the statistical sample size was selected as a sample by simple random method using Cochran's limited statistical population formula. In the present study, the field method was used to collect primary data and the primary data collection tool was a five-point Likert questionnaire and the library method was used to collect secondary data. Validity of the questionnaire was the method of content validity and face validity and its reliability was calculated using Cronbach's alpha, the total reliability of which is equal to 0.92. To test the research hypotheses, the structural equation modeling method of LISREL software was used. The results showed that manpower capital has a positive and significant effect on social entrepreneurship and manpower capital has a positive and significant effect on business entrepreneurship and also the dimensions of manpower capital, private and public dimensions have a positive and significant effect on social entrepreneurship and business entrepreneurship.

The main purpose of this research is investigation of human resource flexibility effect on organizational innovation with the mediating role of adaptability culture in the Iranian blood transfusion organization. The hypotheses of the research examine effect of staff skill flexibility, staff behavior flexibility, and the flexibility of human resources activities on adaptability culture as well as the effect of adaptability culture on service innovation and process innovation. The type of the research, in terms of purpose is practical and descriptive in term of usage. The statistical population of this research is 242 people of managers and employees of Tehran Blood Transfusion Organization and its statistical sample is based on Cochran formula. For this purpose, 242 questionnaires were distributed among the sample members that were selected by simple random method from among the statistical population. The data gathering tool of present research is the questionnaire that its reliability was evaluated and validated by calculation of Cronbach's alpha, compilation (duplication) and composite reliability. The validity of the research tool has been confirmed by nominal, content, and convergent validity methods. Structural equations modeling method and smart PLS software were used to analyze the information. The results of present study show the effect of staff skill flexibility and staff behavior flexibility on adaptability culture as well as the effect of adaptability culture on service innovation and process innovation. The results also show the mediating role of adaptability culture in the relationship between the staff skills flexibility and the staff behavior flexibility with service innovation and process innovation.