Diffusion of knowledge in social media networks: effects of reputation mechanisms and distribution of knowledge roles
研究了社交媒体网络中声誉机制（自适应与客观）和知识角色（寻求者、贡献者、中间人）分布对知识扩散的影响，发现中间人多的分布和客观声誉机制更有效，且两者存在交互作用。
Abstract Social media platforms serve as important tools for diffusing knowledge within organizations. The factors affecting knowledge diffusion through social media networks (SMNs) need to therefore be better understood. Accordingly, this paper focuses on two SMN‐specific characteristics – reputation mechanisms and the distribution of knowledge roles – which are argued to enhance and enable, respectively, the smooth transfer of knowledge in a SMN. To examine their effects, we distinguish between two types of reputation mechanisms – adaptive and objective – and across three distinct knowledge roles in SMNs: seekers, contributors and brokers. We argue that the extent of knowledge diffusion in the SMN depends on the type of mechanism and the relative distribution of these three roles. Using data collected through an agent‐based simulation, we find that (a) the distribution of knowledge roles affects knowledge diffusion, with distributions consisted of more brokers outperforming others and (b) objective reputation mechanisms outperform adaptive mechanisms. Furthermore, we find that reputation mechanisms and distribution of knowledge roles interact to influence knowledge diffusion. The study's implications for future research and practice are discussed in the light of its limitations. © 2016 John Wiley & Sons Ltd