Bank-firm credit network in Japan: an analysis of a bipartite network

We investigate the networked nature of the Japanese credit market. Our investigation is performed with tools of network science. In our investigation we perform community detection with an algorithm which is identifying communities composed of both banks and firms. We show that the communities obtai...

Full description

Saved in:
Bibliographic Details
Published in:PloS one 2015-05, Vol.10 (5), p.e0123079
Main Authors: Marotta, Luca, Miccichè, Salvatore, Fujiwara, Yoshi, Iyetomi, Hiroshi, Aoyama, Hideaki, Gallegati, Mauro, Mantegna, Rosario N
Format: Article
Language:English
Subjects:
Algorithms
Banks
Commerce
Communities
Datasets
Economic sectors
Economics
Empirical analysis
Evolution
Financial statements
Geographical distribution
International conferences
Japan
Markets
Overexpression
Probability
Residence Characteristics
Science
Statistical methods
Stock exchanges
Studies
Time Factors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the networked nature of the Japanese credit market. Our investigation is performed with tools of network science. In our investigation we perform community detection with an algorithm which is identifying communities composed of both banks and firms. We show that the communities obtained by directly working on the bipartite network carry information about the networked nature of the Japanese credit market. Our analysis is performed for each calendar year during the time period from 1980 to 2011. To investigate the time evolution of the networked structure of the credit market we introduce a new statistical method to track the time evolution of detected communities. We then characterize the time evolution of communities by detecting for each time evolving set of communities the over-expression of attributes of firms and banks. Specifically, we consider as attributes the economic sector and the geographical location of firms and the type of banks. In our 32-year-long analysis we detect a persistence of the over-expression of attributes of communities of banks and firms together with a slow dynamic of changes from some specific attributes to new ones. Our empirical observations show that the credit market in Japan is a networked market where the type of banks, geographical location of firms and banks, and economic sector of the firm play a role in shaping the credit relationships between banks and firms.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0123079