9Corrado Carol, John Haltiwanger, and Daniel Sichel, eds. Measuring capital in the new economy.University of Chicago Press, 2005.
10Jorgenson,Dale W., Mun S. Ho, and Kevin J. Stiroh .A Retrospective Look at the U.S. Productivity Growth Resurgence Journal of Economic Perspectives--Volume 22, Number 1 Winter 2008.