“…Because the prospective actors are from various institutional domains, this mode of leadership is also relational in that it requires interaction across boundaries of various types (e.g., organizational/sectoral, professional/disciplinary, territorial/administrative) (Gibney, Copeland, & Murie, 2009;Horlings, Collinge, & Gibney, 2017). As Nicholds, Gibney, Mabey, and Hart (2017) argue, PBL entails a 'complex, large-scale social and economic co-production of activity comprising a range of power and resourcerelated, community and personal agendas and negotiations across organizations, disciplines and professions' (p. 251). There is still, however, only a provisional understanding of how these cross-organizational coalitions can be constructed and steered in strategic directions, particularly by actors in 'non-assigned' leadership positions without formal governance authority or resources (Sotarauta, 2016b).…”