The Diffusion of Information Technology Capital: An Industry Analysis

信息技术（IT）资本目前占7% 占美国总股本的30%， 快速增长的资本支出份额，使其成为 近代最重要的创新。 令人惊讶的是， 很少有理论或实证分析集中在 信息技术的扩散，特别是量化其增长。 给定 信息技术作为资本投入在每个部门的重要作用， 对于经济来说，分析这些增长趋势非常重要。 本项目研究了2010年 1972年至1987年期间，工业和总体经济 程度.虽然许多文献都提到了IT的增长， 在创新扩散和S曲线的背景下， 行为，它认为，在这个项目中，下降的成本， 计算将对未来的模式产生重大影响 扩散 研究者建立了需求的经济模型 for IT that integrate集成these two factors因素. 模型还检查了 其他因素的影响，包括劳动力成本 和一般业务条件对IT的需求。质量 确定了模型的形式和参数 通过经济计量学分析的数据， 信息技术在工业和总体经济水平上的作用. 研究 检查IT股票的增长程度 解释的影响，创新扩散与 价格效应。首席研究员查看 总量与产业需求关系 功能以及行业间的差异。

Information Technology (IT) capital currently represents 7% oftotal capital stock in the U.S. and accounts for a rapidlygrowing share of capital expenditures, making it one of the mostimportant innovations of recent times. Surprisingly, fewtheoretical or empirical analyses have focussed on the diffusionof IT and in particular, quantified its growth. Given thesignificant role of IT as a capital input in every sector of theeconomy, it is important to analyze these growth trends. This project studies the demand for IT capital for the period1972.1987 at both the industry and the aggregate economy levels. While much of the literature refers to the growth of IT in thecontext of the diffusion of innovation and S.curve behavior, itis argued in this project that the declining costs of computingwill have a significant impact on the pattern of diffusion. Theresearcher develops economic models of the demand for IT thatintegrate these two factors. The models also examine theinfluence of other factors, including the cost of labor andgeneral business conditions on the demand for IT. The quality ofthe models, and their form and parameters are determined throughan econometric analysis of data on the stocks and flows of IT atthe industry and aggregate economy levels. The research examinesthe extent to which the growth of IT stock can be explained bythe effects of the innovation diffusion versus the price effects. The Principal Investigator looks at the relationships between theaggregate and the industry demand functions as well as inter.industry differences.