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Re:World's richest 500 see their wealth increase by $1T this... by addicted on Wednesday December 27, 2017 @01:26PM (#16016740)
The choices of year bounds are interesting to say the least.
Re:World's richest 500 see their wealth increase by $1T this... by ChrisLomont on Wednesday December 27, 2017 @04:45PM (#16018310)
Those changes are about the same for any window of the same time length for all of recent US history. St. Louis FRED has data and papers on this.

One of the best studies on intergenerational mobility in the US, using all IRS records (not sure how hard they had to work to get those) shows that mobility in the US has been fairly constant for 50+ years.

[1] http://www.equality-of-opportunity.org/assets/documents/mobi...