Table 2 Statistics for the overall and the two subperiod networks: 2000–2005 (period 1) and 2006–2011 (period 2)

Nodes

545

251

367

 Of which assignee (firms, PROs, universities)

96

52

60

Density

0.014

0.026

0.020

# Link

148240

31365

67161

# of components

27

26

31

# of nodes in giant component (% nodes)

276 (50.6 %)

38 (15.2 %)

51 (13.9 %)

Average degree

15.4

13.3

15.0

Network centralisation

6.3 %

14.3 %

6.2 %