States and percentiles affected by errors in Pareto interpolations used to generate state-level income thresholds, 1917–2015
| Errors | ||||||
|---|---|---|---|---|---|---|
| States | P90 > P95 | P95 > P99 | P99 > P99.5 | P99.5 > P99.9 | P99.9 > P99.99 | Total number of errors |
| Alaska | 1955, 1982 | 1918, 1919, 1920 | 5 | |||
| Idaho | 1960 | 1 | ||||
| New Mexico | 1965 | 1 | ||||
| West Virginia | 1951, 1952 | 2 | ||||
| Wyoming | 2010, 2012 | 1 | ||||
| South Carolina | 1952 | 1 | ||||
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