A related concern is that, whereas the share of manufacturing in total employment used to peak at more than 20 per cent in countries which now enjoy a high income, this share has fallen to 13-15 per cent for a typical developing country today (figure 1.7, bottom right panel). However, the past decade was marked by only modest productivity growth. Factors constraining higher productivity growth include skills and infrastructure deficits, inefficient allocation of resources and weak technological innovation and diffusion.