Competition in the telecommunications market has significant benefits and impacts in various fields of society such as education, health and the economy. Therefore, it is key not only to monitor the behavior of the concentration of the telecommunications market but also to forecast it to guarantee an adequate level of competition. This work aims to forecast the Linda index of the telecommunications market based on an ARIMA time series model. To achieve this, we obtain data on traffic, revenue, and access from companies in the telecommunications market over a decade and use them to construct the Linda index. The Linda index allows us to measure the possible existence of oligopoly and the inequality between different market shares. The data is modeled through an ARIMA time series to finally predict the future values of the Linda index. The results show that the Colombian telecommunications market has a slight concentration that can affect the level of competition.

This research delves into sustainable educational management practices within Indonesian Islamic universities, aiming to shed light on the current trends, influential authors, co-authorship patterns, prevalent keywords, primary dissemination venues, gaps, and future research directions in this domain. Employing a bibliometric analysis methodology, data was collected using Lens.org software, encompassing publications from various academic databases to ensure a comprehensive exploration. The study reveals a growing interest in sustainability within Indonesian Islamic universities, emphasizing the need for concerted efforts to promote sustainable development. Key findings include identifying influential authors, prevalent keywords, and primary dissemination venues, offering valuable insights for researchers and practitioners in the field. Moreover, gaps and future research directions are highlighted, paving the way for further exploration and enhancement of sustainable educational management practices in Indonesian Islamic universities.

The current research note is written for personnel managers and MBA students, aiming to raise awareness of the importance of work-life balance in employee management policies. In the intersection of work and personal life, the work-life balance is the equilibrium between the two; more specifically, the work-life balance explains the relationship and interaction between an individual's job and their private life. In the research note, we first introduce the concept and characteristics of work-life balance through relevant literature. We then argue the significance of incorporating work-life balance into employee management practices, as the concept of work-life balance helps managers appreciate individual differences and develop more human-oriented awareness in management. We encourage managers to adopt transformational leadership in their management, in which the concept of work-life balance should be embedded in the design and implementation of employee management policies. By giving more autonomy to the employees through work-life balance policies and practices, employees are more likely to appreciate the work and make more contributions accordingly. Practitioner points are also recommended.