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This study aims to examine the influence of employee vitality and tenure on the nexus between citizenship fatigue and knowledge-sharing behaviour among academic staff in Ghanaian higher education institutions.

A sample of 876 faculty members from traditional and technical universities was chosen for the study using convenience sampling technique. Data was analysed using PLS-SEM with SmartPLS 4.

Results reveal that citizenship fatigue negatively influences faculty members’ knowledge-sharing behaviour. In addition, employee vitality and tenure mitigate the negative influence of citizenship fatigue on faculty members’ knowledge-sharing behaviour.

The findings suggest that the management of higher education institutions should focus on creating a workplace culture that cultivates workplace vitality and promotes long tenure to reduce the negative influence of citizenship fatigue on the knowledge-sharing behaviour among faculty members.

This study represents one of the earliest attempts to examine a theoretical framework that connects citizenship fatigue, employee vitality, knowledge-sharing behaviour and employee tenure within the context of higher education.

In the context of severe environmental pollution and resource shortage, this study aims to examine how knowledge flows affect the green activities of firms. Specifically, this paper explored whether the firms’ knowledge flows, namely, knowledge inflow (KIF) and knowledge outflow (KOF), play a moderating role in relationship between corporate environmental responsibility (CER) and green innovation in Chinese high-polluting firms.

The analysis was carried out based on a panel data set of 305 heavy-polluting Chinese listed firms from 2010 to 2020. Meanwhile, this paper adopted the fixed model to empirically attest the proposed hypotheses regarding the relationships among CER, knowledge flows and green innovation.

The results indicate that there is a U-shaped relationship between CER and green innovation, while the two dimensions of knowledge flows exert opposing effects on the nonlinear link between CER and green innovation. Specifically, KIF positively moderates the effect of CER on green innovation, whereas KOF negatively moderates the effect of CER on green innovation.

This study demonstrates how green innovation can be influenced by CER and, moreover, provides a more nuanced understanding of the value of knowledge management (KM) in firms’ green activities. In this way, this paper answers the call for understanding the importance of green transformation in the context of KM.