" One of the advantages of groups over individuals is that they collectively
possess more information than any individual member does. In organizations, one
of the reasons to create groups is to pool information from different divisions
(Mannix & Neale, 2005). Thus, sharing unique information is a critical source of
group potential, both in an absolute sense and in comparison to individual
decision-making. Yet Stasser and his colleagues (Stasser, 1988; Stasser & Stewart,
1992; Stasser & Titus, 1985), as well as others (e.g., Gruenfeld, Mannix, Williams,
& Neale, 1996), show a consistent tendency of groups to focus more on shared
information (information group members already have) than on unique or
unshared information (information known by only one group member). "

― Max H. Bazerman , Judgment in Managerial Decision Making