Not all inequality is created equal: Effects of status versus power hierarchies on competition for upward mobility.

Although hierarchies are thought to be beneficial for groups, empirical evidence is mixed. We argue and find in 7 studies spanning methodologies and samples that different bases of hierarchical differentiation have distinct effects on lower ranking group members' disruptive competitive behavior because status hierarchies are seen as more mutable than are power hierarchies. Greater mutability means that more opportunity exists for upward mobility, which motivates individuals to compete in hopes of advancing their placement in the hierarchy. This research provides further evidence that different bases of hierarchy can have different effects on individuals and the groups of which they are a part and explicates a mechanism for those effects. (c) 2015 APA, all rights reserved).