关键词: 信息技术, 生产率悖论, 投资绩效, 调整速度, Information Technology, Productivity Paradox, Investment Performance, Adjustment Speeds

Abstract: The Information technology (IT) investment performance should be a dynamic change process, affected by the national characteristics, but which is often neglected by the current research. On the basis of the traditional partial adjustment model, this paper assumes the adjustment speed is dynamic and the linear function of national characteristics, thus a partial adjustment model based on dynamic adjustment speed is proposed. The model can analyze the dynamic change process of IT investment performance during the statistical period, and its relationship with adjustable speed. The results show that the influence of IT investment on China's economic growth is not significant, the IT as a factor into the production process, led to a decline in economic performance, thus China exists the phenomenon of IT productivity paradox.