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During the past 30 years, interest in organizational citizenship behaviors (OCBs) has grown substantially. Although much of the early empirical research in this domain was directed at the individual level of analysis, more recently, researchers have focused their attention on identifying the outcomes of group-level or unit-level OCBs, as well as the mediating mechanisms and boundary conditions of the relationships between OCBs and unit-level outcomes. Therefore, the purpose of this article is to provide a summary of the extant literature in this area. First, we discuss the applicability of the types of OCB to the unit level of analysis. Following this, we provide a summary of the literature examining outcomes of unit-level OCBs, with particular attention paid to the mediators and moderators of the relationship between OCBs and unit effectiveness. Next, we examine the methodological characteristics of studies conducted in this research domain. Finally, we make a series of conceptual and methodological recommendations regarding future research on the consequences of unit-level OCBs.

According to leadership trait theory, leaders' personality traits are stable factors in organizational situations and exert significant effects on employees' organizational behaviors. However, studies related to this topic are very limited. In this study, from the leadership trait perspective and based on social identity theory and social exchange theory, the influencing mechanisms of leaders' prosocial tendencies on affiliation-oriented and challenge-oriented organizational citizenship behaviors are investigated. Specifically, leadership prosocial tendency, affective commitment and workplace ostracism are selected as the independent variable, mediating variable and moderating variable, respectively. The data collection is conducted in two stages in which the leader-employee pairing method is adopted. Ultimately, 347 valid questionnaires are collected from 73 teams. Later, the hierarchical regression analysis and bootstrap methods are used to test the study's hypotheses. Leadership prosocial tendencies have significant positive effects on affective commitment (β = 0.282, p < 0.001), affiliation-oriented (β = 0.648, p < 0.001) and challenge-oriented organizational citizenship behaviors (β = 0.521, p < 0.001). There is a significant positive effect of affective commitment on affiliation-oriented (β = 0.103, p < 0.05) and challenge-oriented organizational citizenship behaviors (β = 0.122, p < 0.05). At the same time, the influence of leadership prosocial tendencies on affiliation-oriented (β = 0.619, p < 0.001) and challenge-oriented organizational citizenship behaviors (β = 0.487, p < 0.001) remains significant. In other words, affective commitment partially mediates the relationships between leaders' prosocial tendencies and affiliation-oriented, challenge-oriented organizational citizenship behaviors. Workplace ostracism plays a negative moderating role between leaders' prosocial tendencies and affective commitment (β = -0.098, p < 0.05). Furthermore, workplace ostracism can also mediate the mediating role of affective commitment with 95% bias-corrected confidence intervals [-0.146, -0.017] and [-0.114, -0.003]. The results show that leaders' prosocial tendencies have significant positive effects on both affiliation-oriented and challenge-oriented organizational citizenship behaviors. Affective commitment partially mediates the relationships between leaders' prosocial tendencies and affiliation-oriented and challenge-oriented organizational citizenship behaviors. Workplace ostracism significantly negatively moderates the relationship between leaders' prosocial tendencies and affective commitment. Moreover, the study verifies that the mediating effect of workplace ostracism on affective commitment has a significant moderating effect.

Purpose The purpose of this paper is to develop a theoretical model describing how immigrant employees’ organizational citizenship behaviors (OCBs) are influenced by their immigrant status. Additionally, this study attempts to explore the mediating role of perceived job mobility as well as the moderating role of organizational tenure in the relationship between immigrant status and OCBs. Design/methodology/approach A conceptual analysis was performed. Findings Drawing upon social identity, self-categorization, and impression management theories, this study proposes the following. First, an immigrant employee’s perceived different categorization of employment and organizational status will have a negative impact on his or her challenge-oriented OCB. Second, an immigrant employee’s perceived categorization of employment and organizational status will have a positive impact on his or her affiliation-oriented OCB. Third, perceived job mobility mediates the relationship between the perceived different categorization of employment and organizational status and challenge- and affiliation-oriented OCBs of an immigrant employee. Finally, an immigrant employee’s organizational tenure weakens (or strengthens) the negative (or positive) impact of immigrant status on challenge-oriented (or affiliation-oriented) OCB. Originality/value From a theoretical standpoint, this study provides a novel theoretical base that guides future research on immigrant employees’ OCBs in organizations. More importantly, this study offers recommendations that help maximize the effectiveness of immigrant employee’s OCBs.