Group citizenship behaviour (GCB) is conceptualized as a distinct group-level phenomenon concerning the extent to which work groups engage in behaviours that support other work groups and the organization as a whole. These behaviours are different from task performance; they enhance and maintain...

We draw from the Ego Depletion model and research on sleep physiology to predict a relationship between lack of sleep and individuals' unethical behavior. Laboratory studies showed that sleep quantity is positively related to self-control resources and negative associated with unethical...