The article statistically confirms the hypothesis that was originally put forward that the effectiveness of functioning of the organization, the effectiveness of management, management style correlate with the effectiveness of the staff. The effectiveness of the leader was assessed through the productivity of preparing and holding a meeting as an element of business communications. The following tasks are solved in the article: modern approaches to the classification of management styles are studied, tools for identifying the type of leader are identified. A different orientation of the personality of managers has been revealed: managers with an authoritarian leadership style are focused on the task, on achieving the goal, on getting results at any cost; the democratic style of leadership is focused not so much on the task as on teamwork, a personality of this type has a dialogue orientation; a liberal leader demonstrates low demands on staff, condones misconduct, does not require discipline, often loses control over his subordinates, giving them complete freedom of action. A review of the approaches of various higher educational institutions to the definition of criteria for the effectiveness of activities of the teaching staff is given. The applied part of the study consisted in the fact that through a quantitative assessment of the effectiveness of meetings, as a resultant characteristic of the leader's activity, a correlation interdependence with the effectiveness of organizational units was revealed. The method of studying scientific periodicals, analysis of the obtained data and synthesis of hypotheses, data collection by the method of questionnaire survey using the author's questionnaire were used, the results were statistically evaluated using the Pearson linear correlation method. The results of the questionnaire showed that the best assessment of the style of meetings was given by subordinate leaders who adhere to the democratic management style, and the worst by leaders with authoritarian and liberal management styles.