Abstract: Narcissism is one of the research focuses in social psychology and organization behavior. Although previous researches have begun to explore the effects of the narcissism, the existing knowledge regarding the effects of the employee narcissism on knowledge hiding remains incomplete in the context of Chinese guanxi culture. Based on 242 employee-colleagues, this study examines how narcissism influences employee knowledge hiding by exploring the moderating role of the guanxi human resource management practices. The results indicate that when guanxi human resource management practices are high, narcissism is positively related to employee knowledge hiding, whereas guanxi human resource management practices are low and the relationship is negative. Employee knowledge hiding, in turn, is positively related to colleague's reciprocal knowledge hiding. The indirect effects of narcissism on colleague's reciprocal knowledge hiding via employee knowledge hiding are moderated by guanxi human resource management practices such that these indirect associations are positive when guanxi human resource management practices are high but negative when guanxi human resource management practices are low.

Key words: narcissism, knowledge hiding, reciprocal knowledge hiding, guanxi human resource management practices