Top Income Inequality in the 21st Century: Some Cautionary Notes
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Top income shares have barely changed in last 20yrs, excluding >99.99% 12,000 households. Share of incomes above 99% ~ $372,000 in 2012, but <99.99% ~ $7.2mm in 2012.
Change In Income Distrbution Driven By > 99.99% 12,000 Household. The Share Of Incomes Above The 99% ~ $372,000 in 2012 But < 99.99% ~ $7.2 Million in 2012) Has Barely Changed In Last 20 Years
Fatih Guvenen and Greg Kaplan, "Top Income Inequality in the 21st Century: Some Cautionary Notes," April 2, 2017, https://gregkaplan.uchicago.edu/sites/gregkaplan.uchicago.edu/files/uploads/top_income_inequality_web_April2_2017.pdf
"...Since 2000, different measures of top income inequality have exhibited very different trends. Top income shares based on measures of total income show a continued rise, whereas top income shares based on wage and salary income show no increase in inequality post-2000. The most important difference between these two measures of income is the income that accrues to S-corporations.... But interpreting trends in the S-corporation component is extremely difficult. Feenberg and Poterba (1993), Gordon and Slemrod (2002), and Cooper et al. (2016) warn that much of the recent increase in S-corporation income is income that previously accrued to C-corporations. Such income is not “new” income earned by top earners but is simply income that was previously labeled as corporate income rather than household income....Moreover, the majority of the recent increase in top income shares is due to an increase in average earnings at very high income levels, much higher than that assumed in typical discussions of top income inequality. Once incomes above the 99.99th percentile are excluded (around $7 million in 2012), we see that little continued growth in top income shares has taken place in the last 20 years. Put simply, so far in the 21st century, all the action in top income shares has been S-corporation income at very, very high income levels..."


