“…Research on gatekeepers focused both initially (Allen & Cohen, 1969;Tushman & Scanlan, 1981a) and more recently (Allen et al, 2007;Whelan, Collings, et al, 2010;Whelan et al, 2013) on research and development groups. Later studies expanded the concept, applying it to other contexts such as universities (Petruzzelli, 2008;Petruzzelli, Carbonara, & Rotolo, 2010) EU funded networks (Cassi, Corrocher, Malerba, & Vonortas, 2008), industrial districts (Albino, Garavelli, & Schiuma, 1999;Morrison, 2008), regional networks (Graff, 2011) as well as search engine companies (Vogl & Barrett, 2010) and medicine (Calrsen & Norheim, 2003;Shumsky & Pinker, 2003).…”