Abstract
In 1990's, domestic transportation service and telecommunication service had been improved. Such improvement in communication technology would greatly influence on business network structure. In this study we formulated the problem that estimates Japan's business network structure based on inter-regional information traffic data. In order to clarify longitudinal changes in headquater branch-office arrangement and branch-office function, the estimation procedure of business network structure model is applied for inter-regional traffic data. The results shows that a number of branch-office is decreased, and the branch-office function to decrease the amount of information sending to headquarter, is weakened.
