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Purpose – By applying conservation-of-resource (COR) theory, the purpose of this paper is to examine the effect of a leader’s destructive behaviors, i.e., abusive supervision, on employee knowledge sharing and the moderating effects of learning goal orientation and self-enhancement motives on the aforementioned relationship. Design/methodology/approach – The hypotheses were tested using regression analysis on data from 245 employees in South Korea. Findings – The results showed that abused employees who experience depleted resources are likely to reduce their level of knowledge sharing, in accordance with COR theory. Furthermore, this research demonstrated that the negative effects of abusive supervision may differ depending on individual factors. Specifically, when an individual employee has low internal motivation or available resources for knowledge sharing (low learning orientation and high self-enhancement motive), the detrimental consequence of abusive supervision on knowledge sharing is worsened. Practical implications – The research suggests that managers should be aware of the deleterious effects of abusive supervision on knowledge sharing and should invest more time and effort in preventing abusive supervision in the workplace. Originality/value – Although organizations might invest significant amounts of effort in knowledge sharing, abusive supervision could be a barrier that discourages employees’ knowledge sharing. Yet, the strength of aforementioned relationship is dependent on individual factors. In order to achieve organizational effectiveness through knowledge sharing, the critical role of leaders’ behavior and employees’ characteristics or motivation should not be overlooked.

Considering the importance of coworkers and knowledge sharing in current business environment, this study intends to advance understanding by investigating the effect of coworker knowledge sharing on focal employees' task performance. Furthermore, by taking an interactional perspective, this study examines the boundary conditions of coworker knowledge sharing on task performance. Data from 149 samples indicate that there is a positive relationship between coworker knowledge sharing and task performance, and this relationship is strengthened when general self-efficacy or abusive supervision is low rather than high. Our findings suggest that the recipients' characteristics and leaders' behaviors could be important contingent factors that limit the effect of coworker knowledge sharing on task performance. Implications for theory and practice are discussed.

Knowledge sharing is essential for achieving sustainable competitive advantages for organizations. Yet, there is a paucity of studies examining how a supervisor's behavior, particularly, abusive supervision may become a barrier of individuals' knowledge sharing. Drawing on insights from social exchange theory, this study investigates the influence of abusive supervision on knowledge sharing, moderated by support from organization and coworker. Consistent with our hypotheses, abused employees do not share their knowledge, but the negative effect could be buffered when they perceive high organizational support. Implications and future research directions are discussed.

In today's hurried information-oriented business environment, it is crucial to examine under what conditions individuals may perform for creativity. Taking an interactional perspective, this study investigates how the interactions of proactive personality and empowering leadership or close monitoring behaviour may influence employee creativity in opposite directions. Data from 163 samples indicate that proactive personality promotes creativity, while close monitoring behaviour lowers creativity.Furthermore, the study shows that proactive employees are likely to engage in creativity when their leaders demonstrate high levels of empowering leadership.Theoretical and practical implications are discussed.

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