Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
976054 | Physica A: Statistical Mechanics and its Applications | 2010 | 12 Pages |
Abstract
The community structure of two real-world financial networks, namely the board network and the ownership network of the firms of the Italian Stock Exchange, is analyzed by means of the maximum modularity approach. The main result is that both networks exhibit a strong community structure and, moreover, that the two structures overlap significantly. This is due to a number of reasons, including the existence of pyramidal groups and directors serving in several boards. Overall, this means that the “small world” of listed companies is actually split into well identifiable “continents” (i.e., the communities).
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Carlo Piccardi, Lisa Calatroni, Fabio Bertoni,