Social media makes fast inroads into corporate workplaces. Enterprise Social Networking (ESN) is associated with improved communication, information-sharing and has been argud to lead to more democratic communication patterns, whereby users increasingly derive authority from their contributions to the network rather than their position in the formal hierarchy. At the same time, this development remains largely un-explored empirically. Against this background, we explore the influnce of both a user´s hierarchical level and level of communication activity on their ability to elicit responses from other ESN users. We draw on a uniqu data set of more than 110,000 messages collected from the ESN platform Yammer at Deloitte Australia. We confirm the existence of both kinds of influnce, formal and informal, yet we show that communication activity has a much stronger effect than a user´s hierarchical position. We conclude that communication behaviour has a bigger influnce on information diffusion than formal hierarchies. This points to the potentials of enterprise social networks in improving organic, user-driven communication and knowledge sharing within firms.
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