中文摘要：

信息技术投资绩效应该是一个动态变化的过程,而且受到国家特征的影响,但当前的研究往往忽视了国家特征对信息技术投资绩效的影响。本文在传统局部调整模型的基础上,假设调整速度是动态变动的,且是国家特征的线性函数,提出了一种基于动态调整速度的局部调整模型。该模型可以分析统计期内信息技术投资绩效的动态变化过程,及其与调整速度的关系。结果表明,信息技术投资对中国经济增长的影响并不显著,信息技术作为生产要素进入生产过程后,导致经济绩效的下降,中国存在信息技术的＂生产率悖论＂现象。

英文摘要：

The information technology （IT） investment performance should be a dynamic change process, affected by the national char- acteristics, but which is often neglected by the current research. On the basis of the traditional partial adjustment model, this paper as- sumes 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 sta- tistical period, and its relationship with adjustable speed. The resuhs 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.