We analyzed a network structure formed by monetary transactions between financial institutions. We present a procedure to extract a network structure from a set of records of transactions. The extracted network has self-similarity described by a power-law degree distribution. We also introduce a...

The mechanism of financial transactions provided to society today cannot be determined by a single financial institution, but is determined through a complex structure of mutual cooperation, or a "network", between several financial institutions. Quantitative analysis of such a "network"...