The Impact of Computers on Manufacturing Productivity Growth: A Multiple-Indicators, Multiple-Causes Approach
使用多指标多原因模型，控制测量误差后，发现计算机使用通过改善产品质量促进了生产率增长，对研究信息技术经济效应的学者有参考价值。
An increase in computer usage could improve product and labor quality. Unfortunately, many quality improvements are not incorporated in price indexes. Thus, a quality bias could distort conventional estimates of the marginal productivity of computers, which are based on the assumption that prices are measured without error. Using detailed industry data, we estimate a multiple-indicators, multiple-causes model that allows us to investigate this relationship, while controlling for measurement errors. Our findings suggest that computers are an important source of quality change and that computers are positively related to productivity growth when adjustments are made for measurement errors. © 1997 by the President and Fellows of Harvard College and the Massachusetts Institute of Technology