Total economic growth amounts to roughly the sum of the growth of work hours (an increase in the number of workers or the amount of hours that they work) and productivity (output per hour of work). If productivity improves by one percentage point in a year, the improvement of living standards over the subsequent generation would be augmented by one-third.
总体经济增长大约为工作时长（劳动者数量或者工作小时数的增长）以及生产力（每小时劳动的产出）增长的总和。如果某年的生产力提升了一个百分点，那下一代人的生活水平将随之提升1/3。随着时间不断累积，即便是极为细微的生产力提升都将带来极大的影响。