Despite enormous investments in information technology (IT) and significarrt enhancements in the underlying technology there is still coxiuoversy as to whether these investments have made businesses, in aggregate, more productive. Although the information systems literature is replete with anecdotal evidence documenting spectacular successes obtained through IT investments (e.g., American Airlines, American Express, Citibank, Dun and Bradstreet, and Federal Express), there is a critical shortage of research documenting “hard” evidence linking IT investments to increased productivity. There are, however, a significant number of empirical studies that show little or no evidence relating IT to productivity, fueling further the notion of an IT productivity paradox.
Mahmood, Mo and Brynjolfsson, Erik, "Information Technology Productivity Paradox: The Problem Facing IT Managers and Researchers" (1994). ICIS 1994 Proceedings. 38.