Abstract
From around 1990 to present, there have been many studies and discussions relating to computing productivity in firms, but almost of them have been limited only to information systems. However, there have been rarely such kinds of research as analyzing simultaneously the effects brought from both manufacturing facilities and information investments. Therefore, statistical analysis on securities report data had been done relating to companies of three business categories, i.e. chemicals, machinery and electrical machinery, listed in Tokyo Stock Exchange 1st Section. Now, the existence of regional differences is studied on the computing productivity of enterprises located in Tokai region, i.e. Shizuoka, Aichi, Gifu and Mie.
