from the Richmond Fed
Many studies show that income inequality in the United States is high and increasing, but not everyone agrees about what the data mean, or even whether income is the best way to look at economic inequality. There’s also disagreement on inequality’s effects.
[click on image below to read the entire study]
Source: http://www.richmondfed.org/publications/research/econ_focus/2014/q1/pdf/feature1.pdf