The impact of unfair treatment on depressive mood: the moderating role of self-esteem level and self-esteem instability.

This research examines the moderating roles of self-esteem level and self-esteem instability in the relationship between perceived unfair treatment and depressive mood. Based on the assumption that unfairness is a threat to one's social standing and self-esteem, the authors proposed that individuals with highly fragile self-esteem (i.e., the combination of unstable and high self-esteem) react more strongly when experiencing unfair treatment. This hypothesis was tested in a real-world setting using cross-sectional and diary data of 101 employees. As expected, unfair treatment was related to depressive mood among individuals with unstable high self-esteem but not among individuals with stable high self-esteem. This pattern of results held for both cross-sectional and diary data. In contrast, unfairness was not related to depressive mood among individuals with unstable low self-esteem.