"Too Much of a Good Thing", Economist, March 26, 2016.
395
Adrian Wooldridge, "The Rise of the Superstars", Economist, Special Report, September 17, 2016.
396
Dan Andrews, Chiara Criscuolo, and Peter Gal, Frontier Firms, Technology Diffusion and Public Policy: Micro Evidence from OECD Countries, OECD Productivity Working Paper, 2015.