The revised version went through a professional, native English editing. Thank you for your recommendation. We provided minor corrections to our manuscript based on the following comments. The revised version went through a professional, native English editing.
o P. 22: “differences might be attributed to those in innovation systems as basic conditions of clusters.” This is central, so the discussion should be summarised in the conclusions, preferably R15 taking up the three hypotheses: To what extent and how can differences in cluster policies and cluster management be linked to differences in national systems of innovation?