7Erynjolfsson. The productivityparadox of information technology.Communications of the AC ,35(1993) :66 - 77.
8Brynjofsson & Hitt. Paradox lost? Firm-level evidence on the returns to information systmes spending. Management Science,Vol. 42, No. 4, Apirl 1996,541 - 558.
9Dewan & Kraemer. Information technology and productivity:evidence from country-level data. Management Science, Vol. 46,No .4, April 2000,548 - 562.
10Stratopoulos & Dehning. Does successful investment in information technology solve the productivity paradox? Information & Management, 38(2000), 103 - 117.