“…This brings us to the second important dimension of the reviewed articles. Thus, our analysis allowed to identify three key roles which different actors may assume in the cluster: facilitators (Eklinder-Frick et al 2012, Connell et al 2014, Leroux et al 2014, Burger et al 2015, Castro 2015, Giest 2015, Aslesen and Pettersen 2017, sponsors and/or stakeholders (Arthurs et al 2009, Giest 2015, Berkowitz 2018, Zhong and Tang 2018 as well as visionaries or champions (Klofsten et al 2015, Wei et al 2016, Yström and Aspenberg 2017. The facilitation role can include a broad range of activities such as the creation of conditions conducive to knowledge sharing, collective learning, trustand capability-building (e.g.…”