TIC-STH 2009, 2009 IEEE Toronto International Conference Science and Technology for Humanity, September 2-27, 2009, Toronto, Canada
Author(s)
Rotundo, Giulia
D'Arcangelis, Anna Maria
Date Issued
2009
Type
conferenceObject
Start Page
685
End Page
690
Abstract
In this work we aim to understand the role of the topology of financial economic networks on market concentration. We use the Herfindahl-Hirschman index (HHi) as a measure of market concentration, and we detect its maximum and minimum under the condition of scale-free shareholding data distribution, and power-law distribution of size of firms that have been estimated through empirical analyses. We show the relationship among positive correlation of size and the maximum and minimum value of HHi, depending on the parameter describing the scale-free network. The results show the relevance of the scale-free constraint on the values of HHi. ©2009 IEEE.