Percentiles affected by errors in the estimation of interfractile average incomes at the state level, 1917–2015

Errors Number
P90–95 > P95 242
P95–99 > P99 4
P99–99.5 > P99.5 15
P99.5–99.9 > P99.9 5
P99.9–99.99 > P99.99 4

Note: This table does not include errors reported in Table A2.

Source: Authors’ analysis of state-level tax data from Sommeiller 2006 extended to 2015 using state-level data from the Internal Revenue Service SOI Tax Stats (various years) and Piketty and Saez 2016

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