The evidence for the direct relationship between knowledge sharing and team performance (measured through a different source) is an important finding, and it is consistent with research by Bunderson and Sutcliffe (2002). Knowledge sharing is a key team process, yet it remains sparsely researched in field settings. Our findings, along with those of previous research (Bunderson & Sutcliffe, 2002; Lewis, 1999) suggest that for teams whose members have diverse expertise (e.g., newproduct development teams, cross-functional project teams, management teams), knowledge sharing is a critical team process to be examined because, unless the team members share their unique expertise, the purpose of designing such teams would not be served.