Research Article

From the Difference of Structures to the Structure of the Difference

Figure 3

Evolution of the link density, modularity (as calculated through the Louvain’s algorithm [19]), and assortativity of the world air transport network through time. Solid and dashed lines, respectively, represent the networks for the top-50 and top-200 world airports. All series are normalised by subtracting the value at , in order to make them start from .