Bootstrapping the Gini Index of the Network Degree: An Application for Italian Corporate Governance

Carlo Drago and Roberto Ricciuti

No 05/2019, Working Papers from University of Verona, Department of Economics

Abstract: We propose a new approach based on bootstrapping to compare complex networks. This is an important task when we wish to compare the effect of a (policy) shock on the structure of a network. The bootstrap test compares two values of the Gini index, and the test is performed on the difference between them. The application is based on the interlocking directorship network. At the director level, Italian corporate governance is characterized by the widespread occurrence of interlocking directorates. Article 36 of Law 214/2011 prohibited interlocking directorates in the financial sector. We compare the interlocking directorship networks in 2009 (before the reform) with 2012 (after the reform) and find evidence of an asymmetric effect of the reform on the network centrality of the different companies but no significant effects on Gini indices.

Keywords: Complex Networks; Gini Index; Bootstrap Method (search for similar items in EconPapers)
JEL-codes: C13 G34 (search for similar items in EconPapers)
Date: 2019-06
New Economics Papers: this item is included in nep-eur
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