1. The Digital Economy: Promise and Peril in the Age of Networked Intelligence;Tapscott,1994
2. Digital Economy Future Directions;Department of Broadband, Communications and the Digital Economy (DBCDE),2009
3. No Recovery: an Analysis on Long-term U.S. Productivity Decline;US Council on Competitiveness,2016
4. World Economic Outlook Database;International Monetary Fund (IMF),2017
5. The Second Machine Age: Work, Progress, and Prosperity in a Time of Brilliant Technologies;Brynjolfsson,2014