Network Analysis of the ALL (Merged) Network

In this chapter, we focus and deepen the analysis of the ALL networkALL network , which corresponds to the whole multi-layer network, constituted by the merge of the three layers: M2M, D2DDirector-to-Director (D2D) and M2D. The framework of this chapter will be approximately repeated in the three following chapters, each dedicated to one layer, that is, to each coordination type separately. Actually, only for this ALL network,ALL network the statistical analysis has been separated into another chapter—the previous Chap. 3 —while in Chaps. 5 , 6 and 7 , it will be included in the first section. Despite 96% of binary and 99% of weighted links are undirected, because they belong to M2M and D2DDirector-to-Director (D2D) layers, this multi-layer network is a directed network as it gets the direction from the M2D network (to understand how it has been done, see the Methodological Appendix). Each section employs a specific method and in general is differentiated for EASINEASIN , EASIN Integrated (EASINTEASINT ) and EASIN + NEIGH networks, the whole network and its main component (MC)Component Main Component and binary vs weighted links, as it has already been shown in the previous chapter. Firstly, we comment the main indexes of network analysis, which allows to get a view of the whole network. Then, in Sect. 4.2, we move to check whether there are significant correlations between the main centrality indexes and the main economic attributes, which we have seen in the previous chapter. In this chapter, within the correlation section, we provide also a quantification of missing data for economic variables, distinguished also in terms of sectors and countries, with a deepening on the Aerospace IndustryAerospace industry . Then, in Sect. 4.3, we examine in detail the network structure in terms of components and cliques, and we compare the four networks—ALL, M2M, D2D and M2D—under these respects. Further, we analyze the whole multi-layer network in two different aggregated forms: inter-sectoral and inter-country. In the Methodological Appendix, it is explained how we have gathered companies into sectors or countries. A special focus is put on the distribution of coordination within and across sectors and countries, and indeed the sectoral and the geographical perspectives are the lens to understand all other aspects discussed in the following two sections: namely cluster and key-players analysis (Sects. 4.6 and 4.7, respectively). Then, we will show that, in both sectoral and geographical terms, the MC has a rather different composition of the rest of network. The chapter ends with the analysis of the heavy-tailHeavy-tail (HT) distribution of all the main attributes, which is repeated in the three following chapters as well.