In the original papers from Chapter 2 and 3, the term 'upscaling' was used, instead of diffusion. However, in this dissertation we use the framework from Turnheim et al. (2018), which was published after the publication of Chapter 2 and 3. Upscaling in Chapter 2 and 3 covers the diffusion mechanisms 'upscaling' and 'replication' in the framework of Turnheim et al.Author Contributions: Harm van den Heiligenberg proposed the research, carried out the data collection and the analysis and wrote the Chapter. Jifke Sol helped with the data collection. Gaston Heimeriks helped with the methodology. Gaston Heimeriks, Marko Hekkert, Rob Raven and Jifke Sol helped to streamline the argument.