15  See, for instance, R. Dobbs and S. Lund, “Is financial globalisation in retreat? And if so, does it matter?”, 19 June 2013, http://www.voxeu.org/article/financial-globalisation-retreat-or-reset. 16  Gordon, R., 2012, “Is U.S. economic growth over? Faltering innovation confronts the six headwinds”, NBER Working Paper 18315.
17  Krugman, P., September 2013, “Bubbles, Regulation and Secular Stagnation” in http://krugman.blogs.nytimes.com/2013/09/25/bubbles-regulation-and-secular-stagnation; Summers, L., Speech at the IMF Economic Forum on 8 November 2013.