Extant research has demonstrated the positive roles of workplace friendships and has recently found the negative effect or the double-edged effect on employees and organizations. Unfortunately, little is known about the boundary condition of the double-edged effects of workplace friendships and the elaborated understanding of the mechanism of positive and negative effects of workplace friendship simultaneously. Our purpose is to reveal that workplace friendship is a mixed blessing by investigating when and how workplace friendships are likely to promote versus inhibit voice behavior. We propose that the double-edged effect of workplace friendship hinges on the competitive climate. Specifically, when the competitive climate is low, workplace friendship is positively related to employees' psychological safety, promoting voice behavior. In contrast, workplace friendship is positively related to employees' face concern, inhibiting voice behavior when the competitive climate is high. Our hypotheses were supported across the three waves of surveys and experimental studies. Taken together, our findings reveal the perils and benefits of workplace friendship and the importance of boundary conditions resulting in employees' differential psychological processes in friendship interaction.
