Reynolds writes
...Thomas Piketty and Emmanuel Saez, ... half of that increase happened in just two years, 1987 and 1988. ...Brad writesIncreases in the top 1 percent's income after the 1986 Tax Reform came from more business income being reported on individual tax returns, rather than corporate tax returns. The share of the top 1 percent income coming from business profits jumped from 11 percent in 1986 to 21 percent in 1988, ... How and why that happened is a textbook example of why tax return data cannot be used to measure income distribution...
29% of 17% is 5% as the tax-return-estimate based share of business income reported by the top one-hundredth. If the tax law were different today, a good chunk of that 5% would be reported as capital income, and a smaller chunk as labor income. The estimates the people I talk to come up with is that the 1986 Tax Reform boosted the long-run measured share of the top one-hundredth relative to the true share by between 0 and 2 percentage points, leaving between 7 and 9 percentage points as the true underlying increase in the income share of the top one-hundredth.I write
Hmmm I am about to give a lecture on measuring inequality in which I will have something good to say about Reynolds' argument (which I made in a comment to an earlier post). Part of what happened in 86-89 was reduced disguising of personal income as capital gains via tax shelters. Another part was reduced disguising of personal income as corporate income which should show up as capital gains eventually.
If fact a google images search for piketty Saez shows this
(just search for Saez and you get some rock singer giving you the finger
Back to E Saez. an image
in the ratio of capital gains and income going to the richest 1% over GDP even greater over all but just wildly bouncing around then as people replanned their tax avoidance schemes (also something odd seems to have happened in October 1987 what was that ?).
Mehra and Prescott remind us that, over the short run capital gains are very noisy but in the long run they are predictable. A look at the top 1%'s income plus capital gains shows that the effect of tax reform on reported income was huge and that the apparent long run increase in inequality is genuine and gigantic.