"You can see the computer age everywhere but in the productivity statistics."
Erik Brynjolfsson: The Productivity Paradox of Information Technology, Communications of the ACM 36(12):66-77 December 1993 (PDF)
The productivity paradox, MIT Technology Review, 2018-06-18
Avoiding the Productivity Paradox, Gamba Academy, 2019-03-25
The Productivity Paradox of Information Technology: Review and Assessment, Erik Brynjolfsson, MIT Sloan School of Management