Impact of Information Technology on Competitive Scope──Perfection and Correction to Porter's Viewpoint

When analysing impact of IT on business, Professor Porter departed from his former ideology, his discussion is not all-sided and totally correct Being not considerate is that he commented impact on geographical scope and industrial scope only, excluding segmentary scope and vertical scope. Being not correct is that he mentioned expanding or shrinking of competitive scope in general, but the changing direction of four competitive scopes is not always consistent. This paper considers that under impact of information technology, the three of four competitive scopes will shrink: segmentary scope, industrial scope and vertical scope; only one will expand: geographical scope.