“…While researchers have theoretically (Anonymous, 1998;Rains & Scott, 2007;Reicher et al, 1995) and empirically (Jackson et al, 2018;Kim et al, 2019;Klein, Spears, & Reicher, 2007;Kolbitsch, 2006;Pisonneault & Heppel, 1997;Postmes, Spears, Sakhel, & de Groot, 2001;Tanis & Postmes, 2007) examined the role that anonymity plays in group-level outcomes, we lack knowledge about how APC per se affect OSS projects' performance. Some studies suggest a negative relationship between anonymous participation and group outcomes (Kim et al, 2019;Zimbardo, 1969), some suggest a positive relationship (Postmes et al, 2001;Reicher et al, 1995), and still others suggest contingencies that alter the relationship (Ren et al, 2007). In this section, we review these studies as a foundation to develop hypotheses to further understand the role that APC play in open and distributed innovation projects.…”