Broadband and Structural Separation from the Perspective of Transaction Cost Economics

Abstract

Conduct regulation and structural separation are often discussed in industrial organisation studies as options to prevent the abuse of market power by vertically integrated firms toward the downstream market. Both the structural separation of NTT and conduct regulation have been discussed in the Japanese telecommunications industry since the introduction of competition in 1985 and the issue is still being discussed, although the industry is going through a transition from POTS (Plain Old Telephone Service) to the broadband internet. Past discussions have been inclined toward elimination of the harmful effects of vertical integration. However, there is a benefit of vertical integration in the sense that it will promote the efficient management of the firm concerned. I will present a new contention that it is important to conclude a balanced analysis of costs and benefits of vertical integration based on transaction cost theory. Structural separation in the broadband market entails significant transaction costs between a carrier with access facilities and firms offering broadband services by renting these facilities as input. These kinds of transaction costs are comparatively negligible in POTS. I will make it clear that the balance analysis of costs and benefits of structural separation has become more important in broadband than in POTS based on the actual differences in network structure.