The current research aimed to test the effect of toxic leadership as an independent variable, and the perceived psychological contract violation as an interactive mediating variable on Deviant work behavior, as well as to test the moderator role of moral disengagement on the relationship of both toxic leadership and psychological contract violation to Deviant work behavior among employees in cities councils and local units in Fayoum Governorate. The research relied on a sample of (384), and the data was collected through a survey, the response rate was 83.6%. Depending on the structural equations modeling, the research found that there is a direct positive effect of toxic leadership on both psychological contract violation and Deviant work behavior, and a positive effect of psychological contract violation on Deviant work behavior. the results, also proved a significant moderating role of moral disengagement which modifies the relationship of both toxic leadership and psychological contract violation with Deviant work behavior.

The aim of the research is to test the role of knowledge hiding behavior as a mediating variable that can explain the effect of abusive supervision on the innovative work behavior of bank employees. We Tested Two models of the relationships between the research variables on data collected from 277 1 .bsu.edu.eg elsenoussi@commerce ‫سنوسي‬ ‫زعزوع‬ ‫حامد‬ ‫المعرفة‬ ‫إخفاء‬ ‫سلوكيات‬ ‫ى‬ ‫االبتكار‬ ‫العمل‬ ‫وسلوك‬ 731‫التجارية‬ ‫و‬ ‫المالية‬ ‫اسات‬ ‫الدر‬ ‫مجلة‬ ‫العدد‬ ‫الثالث‬ 2022 individual employees of bank branches in Fayoum Governorate, The results show that: abusive supervision has a direct, negative, significant effect on innovative work behavior, but, when knowledge-hiding behavior was entered as a mediating variable In the structural equations, the direct effect of abusive supervision on innovative work behavior became insignificant, while it had an indirect negative effect through knowledge hiding. And it was proven that knowledge hiding had a complete mediation role that explains the effect of abusive supervision on innovative work behavior.