We added a discussion on the national systems of innovation in the first two paragraphs of Section 3.1 (p. 9) referring to the suggested seminal works. Moreover, in the remaining part of this section (pp. 10-11), we added some sentences with supporting references on the underlying institutional differences.
• Page 10, line 28: The number of 85 applicants contains some clusters who applied more than once in the three rounds of the contest.