In addition GORDON (2013) provided evidence that multifactor productivity growth in the U.S. after 2004 has returned to the rate achieved during the post-1972 slowdown period, which indicates that "the revival of productivity growth associated with the dot.com revolution is over". This view is also shared by COWEN (2011) who considers that the main sources of productivity growth in the U.S. have already been exploited and that the pace of technological innovation is expected to decline leading to lower employment creation.