Although government statisticians do their best to gauge the rise in real GDP through time, there are two problems that are very difficult to overcome in measuring real incomes: increases in the quality of goods and services, and the introduction of new ones. I believe that both of these problems cause the official measure of real GDP growth to understate the true growth of the standard of living that real GDP is supposed to indicate.
但情况其实比这些数字所显示的要好。虽然政府统计人员尽其所能去评估实际GDP随时间的增长，但在测量实际收入方面依然存在两个非常难以克服的难题：商品和服务质量的提升，以及新事物的引入。我相信这两个问题都会导致对实际GDP增长的官方测量低于该指标希望反映的生活水平实际增长。