Research on Economic effectiveness of Introduction of ICT at the Industry/Firm Level : An Empirical Analysis on Economic Structure using of Information Network and Future ICT Strategy

本研究旨在实证分析各产业投资资讯通讯科技（ICT）的经济效益，并提供基础数据，以规划未来。信息通信技术战略。为此，我们首先建立了与信息通信技术相关的官方统计数据库，并对“信息通信技术投资”进行了估算。在此基础上，本文选择增长会计、DEA（数据包络分析）和生产函数前沿法作为分析工具，将这些方法应用于信息通信技术投资估算数据，以衡量信息通信技术的经济效益。我们得出了如下的初步结论：在一些行业中，对信息通信技术的投资并没有促进生产率的提高，这意味着这些行业存在效率低下的问题。从这个初步的结论，我们可以说，在日本，所谓的新经济现象至少到1994年才出现。研究结果还表明，引进国际贸易中心对各行业劳动生产率增长的贡献在90年代前半期比80年代后半期有所下降，但在90年代后半期又有所上升。鉴于这些结果，很难通过分析得出ITC对经济产生影响的结论。然后，提出了这样一个问题，即这种经济影响的缺乏是由于ITC的软件而不是硬件未能有效应用造成的。为了验证这一点，对信息服务业进行了分析，信息服务业是与ICT实际应用相关的各种服务的主要提供者，重点关注其成本结构。分析结果表明，该行业存在分包结构和缺乏高盈利能力的打包软件是引入ICT的企业发生高调整成本的主要原因。

The purpose of this research is to analyze empirically the economic effectiveness of investment in ICT (Information Communication Technology) industry by industry, and to give basic data in order to plan the future. ICT strategy. To accomplish this purpose, we first built the database of ICT-related officially published statistics, and estimated "Investment in ICT." Then we selected Growth Accounting, DEA (Data Envelopment Analysis), and Production Function Frontier Method as analytical tools, and applied these, methods to estimated Investment in ICT data to measure Economic Effectiveness of ICT. We have reached the tentative conclusion as follows : in several industries, Investment in ICT did not contribute increase in productivity, which means, that inefficiencies, existed in these industries. From this tentative conclusion, we can say that, in Japan, so-called New economy phenomenon was not observed at least until 1994.The results also show that the contribution of ITC introduction to the growth of labor productivity in the first half of 1990s decreased from the second half of 1980s in all industries, and then increased again in the second half of 1990s. Given these results, it can hardly be concluded that ITC has had the impacts on the economy through the period of analysis. Then, a question is raised that such lack of economic impacts is caused by the failure in effective application of ITC software rather than its hardware. In order to verify it, the analysis of the Information Service Industry is performed, which is the major provider of various services related to the practical use of ICT, with focus on its cost structure. The result of this analysis indicates -that the existence of sub-contracting structure in this industry and the lack of package software with high profitability are the major causes of high Adjustment Cost occurred in the firms which introduced ICT.