“…However, despite there being growth in UIC studies (e.g., Alexandre et al, 2022;Bamford et al, 2023;Dias & Selan, 2023;O'Dwyer et al, 2023;Schoen et al, 2014;Tian et al, 2022;Vivona et al, 2023), there are still few empirical studies that explore the motivations behind why some researchers engage in this type of collaboration and others do not (Kilian et al, 2015;Martínez-Ardila et al, 2023;Rossoni et al, 2023). Furthermore, little work has been carried out on UIC channels and the factors that possibly act as barriers, that is, that make participation in UIC difficult from the perspective of individual researchers, especially in cross-border regions (Knoll et al, 2021;Mascarenhas et al, 2022). A widely shared conclusion (e.g., Bertello et al, 2022;Freitas & Von Tunzelmann, 2008) is that policies cannot be transferred from one country to another and that in cross-border regions it becomes difficult to reach consensus between countries.…”