The Study of the Spatial Heterogeneity and Structural Evolution of the Producer Services Trade Network

Table 5

Density matrix of cohesive subgroups of the producer services trade network.

2000					2012
	I	II	III	IV		I	II	III	IV
I	0.833	0.515	0.144	0.000	I	0.980	0.797	0.427	0.103
II	0.509	0.081	0.028	0.000	II	0.652	0.190	0.033	0.043
III	0.149	0.021	0.010	0.000	III	0.491	0.054	0.244	0.011
IV	0.000	0.009	0.000	0.000	IV	0.183	0.037	0.022	0.048