The problem is that rapid labor-productivity growth in the industrial sector – more than 10% per year over the last two decades – is reducing the need to hire more workers. The service sector, by contrast, experienced much slower labor-productivity growth (about 5% annually over the same period), meaning that it could be far more effective in generating employment growth.
问题在于，工业部门快速的劳动生产率增长（过去二十年每年大于10%）正在减少雇用更多工人的需要。相反，服务业劳动生产率增长要缓慢得多（过去二十年每年大约5%），这意味着其在创造就业增长方面远比工业部门有效。在美国，2012年80%左右的劳动力在服务业中就业。