Hills, Thomas and Dimsdale (2015 forthcoming), Bank of England. Homer, S and Sylla, R (1991), “A history of interest rates”, ISBN: 978–0471732839. Hutton, W (2015), “How Good We Can Be: Ending the Mercenary Society and Building a Great Country”, ISBN: 978–1408705315. IMF (2014), “Redistribution, Inequality, and Growth”, IMF Staff Discussion Note, available at: http://www.imf.org/external/pubs/ft/sdn/2014/sdn1402.pdf. Hall, R and Jones, C (1999), “Why do some countries produce so much more output per worker than others?”, Quarterly Journal of Economics Vol 114. Kahneman, D (2012), “Thinking, Fast and Slow”, ISBN: 978–0141033570. BIS central bankers’ speeches  15  King, M and Low, D (2014), “Measuring the ‘world’ real interest rate”, NBER Working Paper 19887. Koopmans, T (1965), “On the Concept of Optimal Economic Growth”, Volume 28 of Pontificiae Academiae Scientiarum scripta varia. Kremer (1993), “Population growth and technological change: One Million BC to 1990”, The Quarterly Journal of Economics Vol 108 No 3. Levine, R and Renelt, D (1992), “A sensitivity analysis of cross-country growth regressions”, The American Economic Review Vol 82 Issue 4. Malthus, T (1798), “An Essay on the Principle of Population”, reprinted in 2010 as ISBN: 978–1450535540. Mazzucato, M (2013), “The entrepreneurial state”, ISBN: 978–0857282521. McKinsey Global Institute (2010), “Farewell to cheap capital: the implications of long-term shifts in global investment and saving”, available at: http://www.mckinsey.com/insights/global_capital_markets/farewell_cheap_capital. Mischel, W (2014), “The Marshmallow Test: Mastering Self-Control”, ISBN: 978– 1469249087. Mokyr, J (2014), “Secular stagnation? Not in your life”, in VoxEU (2014). Morris, I (2010), “Social Development”, available at: http://www.ianmorris.org.

Wars, depressions and financial crises have pock-marked history, causing growth to stall or fall. And phases of innovation have lifted economic fortunes, caused living standards to leap. But whereas the growth lapses have been temporary, the leaps have been permanent. Over the past two and a half centuries, secular innovation has dwarfed secular stagnation. In explaining rising living standards since 1750, economists have typically identified three distinct innovation phases. Each was associated with a great leap forward in society’s production possibility frontier. 9 The first is the Industrial Revolution commencing in the middle of the 18th century; the second, the era of mass industrialisation, starting in the second half of the 19th century; and the third is the IT revolution, which began life in the second half of the 20th century. What distinguished these three innovation phases is that they gave birth to a sequence of socalled General Purchase Technologies (GPTs). 10 These technologies had applicability well beyond the sector for which they were originally designed, thereby transforming the efficiency of business practices generally. During the first industrial revolution, these GPTs included the steam engine, cotton spinning and railways; during the second, electricity, the internal combustion engine and internal water supply and sanitation; and in the third, the personal computer and the internet. Interest in innovation-led growth has re-intensified over recent years as growth prospects have dimmed. One strand of the secular stagnation debate asks – wither innovation? Among some there is a concern the well of innovation may be running dry.