I highly recommend Estelle Sommeiller and Mark Price’s report on growing income inequality by state since 1979. Some of their findings from the executive summary (you can download the PDF at the link).
Lopsided income growth characterizes every state between 1979 and 2007.
In four states (Nevada, Wyoming, Michigan, and Alaska), only the top 1 percent experienced rising incomes between 1979 and 2007, and the average income of the bottom 99 percent fell.
In another 15 states the top 1 percent captured between half and 84 percent of all income growth between 1979 and 2007. Those states are Arizona (where 84.2 percent of all income growth was captured by the top 1 percent), Oregon (81.8 percent), New Mexico (72.6 percent), Hawaii (70.9 percent), Florida (68.9 percent), New York (67.6 percent), Illinois (64.9 percent), Connecticut (63.9 percent), California (62.4 percent), Washington (59.1 percent), Texas (55.3 percent), Montana (55.2 percent), Utah (54.1 percent), South Carolina (54.0 percent), and West Virginia (53.3 percent).
In the 10 states in which the top 1 percent captured the smallest share of income growth from 1979 to 2007, the top 1 percent captured between about a quarter and just over a third of all income growth. Those states are Louisiana (where 25.6 percent of all income growth was captured by the top 1 percent), Virginia (29.5 percent), Iowa (29.8 percent), Mississippi (29.8 percent), Maine (30.5 percent), Rhode Island (32.6 percent), Nebraska (33.5 percent), Maryland (33.6 percent), Arkansas (34.0 percent), and North Dakota (34.2 percent).
The lopsided growth in U.S. incomes observed between 1979 and 2007 resulted in a rise in every state in the top 1 percent’s share of income. This rise in income inequality represents a sharp reversal of the patterns of income growth that prevailed in the half century following the beginning of the Great Depression; the share of income held by the top 1 percent declined in every state but one between 1928 and 1979.