대기업과 중소기업간 거래네트워크 구조와 특성

Abstract

This study investigates structural characteristics of supplier-customer relation network on which the flagship companies in the 5 industrial sector-representative exporting industries, ie. automobile, electronic, ship building and representative domestic industries, ie telecommunication, system integration-make transactions, with more than 50 thousands data provided by KED for the year of 2011. At first, we confirmed that most companies in 5 sectors have strong and exclusive transactions and that statistically the number of companies with more purchasing transaction number decrease exponentially in the transaction network as predicted by the well known complexity theory. This implies that the networks of transactions for 5 sectors are formed in the way of hub and spoke and that the networks are scale free mostly. But we found that there exist differences in volumes of strong and exclusive transactions in 5 sectors. This become more evident when we see the statistics about the transactions. Non-dominant flagship companies in the automobile and ship building industries and part of the flagship companies in electronic and SW industries show the characteristics that flagship companies have the low ratios of number of 1st and 2nd transaction companies having no other flagship companies as the trade partner-that is sole transaction ratio- and having transactions of more than 50% sales share with the flagship companies-that is exclusive transaction ratio-. These means that there are growing weak and open transactions ie. the diversified transactions in these sectors. However, except these companies, most of the companies shows high sole transaction ratio of 70~80%. Other criteria of showing quality of diversified transaction, the ratios of 1st and 2nd transaction company numbers having transaction with more than one flagship companies are low, between 10 and 30%. These imply deficiency of diversified transaction. We need to differentiate policies according to difference of the degree of strong transactions and the technical bases for each industrial sectors. In the sectors such as software and electronics where companies specially needs weak transactions ie. the diversified transactions to improve the technical potential using the wide range exchange of ideas, we use the policies to improve the chances of diversified transactions. We also need the policies preventing plunder by flagship companies and inducing win-win partnership by expanding the ledge of diversified transactions in all sectors.