Comparative Analysis on the Contribution of Information Technology Revolution to Labor Productivity Growth In U. S. A. and Japan

为了明确1990年以来美国和日本信息技术革命对劳动生产率及其增长的贡献，本文建立了将资本存量划分为信息相关资本存量和其他资本存量的计量经济模型来估计生产函数。新经济理论强调，20世纪90年代美国的经济增长依赖于信息技术革命。但在1999年10月GDP的估算方法改变之前，我们没有发现这种关系。但是，我们可以在2000年之后使用93NA的日期来确认上述关系。通过使用我的上述计量经济模型和93SNA数据，我还可以得到以下显著结果。(1) 1990年以来，美国和日本的信息相关资本存量对劳动生产率增长具有正向影响。所以，我认为生产率悖论在20世纪90年代在美国和日本消失了。(2)对比美日两国劳动生产率的决定因素，日本通过信息技术革命深化信息相关资本存量的贡献率仍低于美国。(3)对比美日两国劳动生产率增长的决定因素，日本单位劳动小时就业的信息相关资本存量的贡献率小于美国。要摆脱泡沫破灭后的长期停滞，信息相关资本存量的积累是必不可少的。

To clarify the contribution of the change of social structure by information technology revolution to labor productivity and it's growth since 1990 in U. S. A. and Japan, I developed the econometric model which divide the capital stock into the information-related capital stock and the other capital stock to estimate the production function.The theory of New Economy has been emphasized that the 1990's economic growth in U. S. A. has depended on the information technology revolution. But we could not find such relationship before the change of estimation method of GDP at October 1999. However, we become to be able to confirm the above relationship by using the date of 93NA after 2000.By using the above my econometric model and 93SNA date, I could also get the following significant results.(1) The information-related capital stock gives positive effect to labor productivity growth since 1990 in U. S. A. and Japan. So, I think the productivity paradox disappeared in 1990's at U. S. A. and Japan.(2) Comparing the determinant of labor productivity between U. S. A. and Japan, Japanese contribution rate of information-related capital stock deepening by information technology revolution is still lower than that in U. S. A.(3) Comparing the determinant of labor productivity growth between U. S. A. and Japan, Japanese contribution rate of information-related capital stock per man-hour of employment is smaller than that in U. S. A.From the above results, in Japan, The accumulation of the information-related capital stock is necessary by all means to get out of long stagnation after the collapse of bubble.