External and internal barriers to knowledge commercialisation and transfer.Source: original compilation based on Baycan and Stough (2013), Beyer (2022), Bjursell and Engstrom (2019), Czemiel-Grzybowska and Brzeziński (2015), D’Este et al. (2012), De Wit-de Vries et al. (2019), Namdarian and Naimi-Sadigh (2018), O’Reilly and Cunningham (2017), van de Burgwal et al. (2019)