A lot of lessons to be learnt here!
On September 12, 2012, the Census issued its report on Income, Poverty, and Healthcare Coverage in the United States: 2011. While the full report has some nice charts, one that was conspicuously missing was on income inequality. The data for such a chart was in the tables, and so I was able to construct the chart above from them. Mean household (not individual) income for each quintile (20%) is expressed in real (inflation-adjusted) dollars.
One feature that jumps out at you are how relatively flat mean income has been for the bottom 80% over the last 45 years and how much it has grown for the top 20%, from an already high baseline. I thought this merited some further investigation.
If you look at the far left, in 1967, the income difference between the quintiles of the bottom 80% was remarkably similar, less than $17,000 between each group ($16,679 between…
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