Other notable measurements of centrality are closeness and betweenness centrality. These metrics rely on the
notion of paths within the network and can also be normalized. Closeness centrality for one node can be calculated
as the average distance of all distances from this node to all other nodes in the network. (Newman M., 2002). Some
scholars define closeness as the inverse of this average, so that larger numbers would mean better performance. We
use this latest definition in the following section..