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

本研究的目的在于，对各产业的ICT（信息通信技术）产业投资的经济效果进行实证分析，为今后的规划提供基础数据。信通技术战略。为此，我们首先建立了官方发布的ICT相关统计数据库，并估算了“ICT投资”。“然后，我们选择了增长核算、数据包络分析（DEA）和生产函数前沿方法作为分析工具，并将这些方法应用于估计ICT数据的投资，以衡量ICT的经济效益。我们得出的初步结论是：在一些行业，信息通信技术的投资并没有促进生产率的提高，这意味着，在这些行业中，效率低下，存在。由此可以说，日本至少在1994年之前没有出现所谓的新经济现象。研究结果还表明，在所有产业中，引进ITC对劳动生产率增长的贡献在90年代前半期从80年代后半期开始下降，到90年代后半期又开始上升。鉴于这些结果，很难得出结论说，国际贸易中心在整个分析期间对经济产生了影响。然后，有人提出一个问题，即这种缺乏经济影响的原因是未能有效应用国贸中心的软件，而不是其硬件。为了验证这一点，对信息服务业进行了分析，这是与实际使用信通技术有关的各种服务的主要提供者，重点是其成本结构。分析结果表明，该行业存在的分包结构和缺乏高利润率的软件包是引入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.