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Purpose: How do dark personality traits impact workplace bullying (WB)? How can organizations mitigate it? This study aims to explore the relationship between the Dark Tetrad (DT) (narcissism, psychopathy [PY], Machiavellianism and sadism [SM]) and WB, proposing the mediation role of moral disengagement (MD) and the moderation role of emotional stability (ES). Design/methodology/approach: The proposed mediated-moderation model was tested on 404 employees working in the hospitality sector in Pakistan. Data have been analyzed through regression analysis and PROCESS macros to test the study's hypotheses. Findings: PY, Machiavellianism and SM positively relate to WB and MD mediates this relationship. A high level of ES reduces the intensity of the mediated influence of PY, Machiavellianism and SM on WB. Practical implications: Developing targeted policies and practices (e.g. personality tests to build a good psychological architecture of the firm) and reviewing processes that support the moral justification of antisocial conduct can be beneficial for limiting WB. In addition, meditation, mindfulness training and supporting trust and cooperation within organizations can increase the mitigating effect of ES and, in turn, reduce WB. Originality/value: To the best of the authors' knowledge, this is the first study that explicitly verifies a mediated-moderation model on DT-WB while proposing a further explanation (i.e. mediation of MD) and a novel solution (i.e., moderation by ES). [ABSTRACT FROM AUTHOR]

The purpose of this article is to identify the effects of dark tetrad personality traits (such as narcissism, psychopathy, Machiavellianism and sadism) on counterproductive work behavior with the mediating role of psychological contract breach and the moderating effect of political skills. Previous researches have focused on the direct effect of the dark triad to measure the counterproductive work behavior of individuals. Recently, everyday sadism has been added to the dark triad and become dark tetrad personality traits. Therefore, this study examines the dark tetrad personality traits to study counterproductive work behavior. This study applied structural equation modeling using partial least square to test the hypotheses on a sample of 400 doctors from the health sector of Pakistan. The results of this study reveal that dark tetrad has a positive and significant effect on counterproductive work behavior, and psychological contract breach significantly partially mediates in the relationship between dark tetrad and counterproductive work behavior. Furthermore, findings show that the moderating effect of political skills also positively and significantly strengthening the link between dark tetrad and the psychological contract breach. The conclusion of this study is made an innovative contribution to the Pakistan health sector, researchers and policy makers to designing the relevant practical implications., (© 2020 John Wiley & Sons, Ltd.)