Through integrating the viewpoints of economic, sociologic, and psychological perspectives, it developed and tested a theoretical frame of incentive mechanism of knowledge sharing involving multi-theory perspective and multi-in- centive factors. The results show that it is a complex process to motivate knowledge sharing, and that three incentives, including extrinsic incentives, intrinsic incentives and relationship quality, all affect the decision making of knowledge sharing. Moreover, it finds that there are interaction effects among the three main incentives, and that extrinsic incen- tive ...