The Pearson correlation coefficient matrix between the tree-based importance measure and other network centrality measures (in logarithm) for the selected years.

The size of the sample is in the parentheses next to the corresponding years. TI is the tree-based importance measure, CC is the closeness centrality, PR is the PageRank centrality, BC is the betweenness centrality, and VT is the industry total value-added. ** means that the coefficient is significant at 1% level. ** means that the coefficient is significant at 1% level.