telecommunication and financial intermediation) as well as health and education. Autor and Salomons do not find significant external effects of other sectors. More worrying, however, are their results on the effects of productivity growth on the composition of labour demand.
They find clear evidence of “polarisation” in the group of 19 advanced economies in that most new jobs were – on average – created for highly skilled employees, whereas jobs for medium or lowskilled workers grew slowly (see Figure 3). 5 / 16  BIS central bankers' speeches  Explaining the slow post-crisis recovery: demand or supply?