Because most households earn the bulk of their income from their labor, the absence of real-wage growth is a major factor behind the stagnation of family incomes. The average family income of the bottom 90% of households has been flat since about 1980.
大部分家庭的大部分收入都来自劳动所得，因此真实工资增长缺失是家庭所得停滞的主要因素。从1980年前后开始，低层90%平均家庭所得几乎未曾改变。2013年中位真实家庭所得比2007年低8%，比1999年峰值低近9%。