I am familiar with the 1860 census and its misuse by the Defenders of the Slaverocracy from way back.
You have sent me no websites with “economists of that time” but they would not refute anything I have said anyway. Once again your imagination is running away with you.
Let me correct you again.
Actually it is per capita income.
And not my calculation.
Again from William Parker's book, Fogel and Engerman, and the University of Virginia, here is the data.......
The per capita income of free populations in 1860 as compiled by the United States Census was the following:
........................South..............North
...........................$150................$142