The LBM’s “importance” in the network was assessed by centrality measures: degree, betweenness, and closeness. “Unweighted” in- and out-degrees, defined as the number of markets sending or receiving traders from a given
market, were highly correlated to the weighted degree, i.e., the number of visits to a given LBM by traders operating in several LBMs (Pearson’s correlation coefficient ρ >0.85).