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In a highly competitive scenario, such as today’s airline business, changes in the regulatory framework may produce important variations in the airlines’ results. An example is the introduction of Sustainable Aviation Fuel (SAF) mandates to help air transport decarbonization. The airlines’ break–even curve provides a useful tool to evaluate the competitive position among airlines and to assess and address the cost impact due to the new regulatory environment. The purpose of this paper is to evaluate the impact of new environmental regulations on airlines’ business results to achieve air transport decarbonization.

Based on the break–even curve and the relationship between fuel cost increment and fuel cost related to the airlines’ operating expenses, the unit cost increment due to SAF introduction is obtained for several scenarios of SAF prices and different airlines.

In many cases, we find that using 100% SAF with prices beyond 1.5 times the present fuel price generates losses: it is not feasible if it is not possible to transfer SAF price to passenger fares due to demand elasticity.

The novelty of this approach is the application of a rationale method to accurately determine the impact of several scenarios of SAF prices on airlines’ business results. This approach also provides a sound and compelling basis to argue before Environmental Regulation Authorities based on facts and figures. This paper is of use and value to airlines, the International Civil Aviation Organization (ICAO), the International Air Transport Association (IATA), practitioners and academics.

The relationship with internal and external actors on the part of higher education institutions (HEIs) is a fundamental factor for them to fully exercise their role in sustainable development and the evolution of individuals, organizations and society as a whole. In this sense, this study aims to analyze the literature about stakeholder management in HEIs and to provide guidelines to support managers of HEIs to enhance stakeholder management practices.

This research was conducted through a bibliometric analysis followed by a content analysis to propose the guidelines to support HEIs’ managers in improving stakeholder management practices.

The guidelines were proposed for each of the following seven areas: engagement and governance; innovation and knowledge management; education for sustainable development; responsible research, innovation and collaborative partnerships; organisational change management; social responsibility; and performance management and sustainability report.

Although the topic addressed has gained traction in the academic community, the literature fails to provide guidelines to support managers of HEIs enhance stakeholder management practices. From a theoretical standpoint, the increasing recognition of the importance of stakeholder engagement reflects a paradigm shift in understanding sustainability and social responsibility in HEIs. On a practical level, managers can use the guidelines to promote effective dialogue, increase stakeholder engagement and collaborative partnerships.

This research aims to understand the primary challenges encountered by entrepreneurs operating in emerging economies, where entrepreneurship plays a vital role. The study places a particular emphasis on entrepreneurs in Brazil.

The research methodology involved the analysis of data obtained from interviews, using both content analysis and Grey Relational Analysis techniques.

The analysis revealed several prominent difficulties that entrepreneurs face in these domains. These challenges encompassed issues such as grappling with intricate taxation systems and the associated tax burden, navigating government bureaucracy, securing access to essential financing and initial investments, contending with the absence of supportive government programs and addressing the dynamic nature of market conditions. The findings on the most critical barriers reveal potential pathways for entrepreneurs, policymakers and universities to act in developing the entrepreneurial ecosystem in emerging economies.

The insights garnered from this research have the potential to inform the formulation of robust public policies aimed at fostering entrepreneurship and innovation in emerging countries. Furthermore, these findings can serve as a valuable resource for planning initiatives designed to train engineers to become successful entrepreneurs.