The article makes a comparative research on the effect
of leader supporting, interpersonal relationship, knowledge
sharing mechanisms and organizational incentive on the formal and
informal knowledge sharing in the project context. Through the
establishment of structural equation model, some conclusions have
been reached as follows: Firstly, leader supporting positively
influences both formal and informal knowledge sharing, whereas the
interpersonal relationship partly mediates between leader
supporting and informal knowledge sharing; Moreover, the
interpersonal relationship has a significant effect on both formal
and informal knowledge sharing; Sharing mechanisms can
significantly promote formal knowledge sharing, but there is no
direct impact on informal side. Instead, the interpersonal
relationship plays a fully mediating role between sharing
mechanism and informal sharing; Finally, organizational incentive
has a significant promotion on formal
sharing, but negatively influences the informal sharing.