My hunch is that the assessors are coming up with their numbers based on the quality of the property and are fair in that regard, but when it comes time to sell the property there is some preference among buyers (call it racism if you will) not to live in a black neighborhood. The assessors in that case should use historical sales data to adjust down the valuation of the property. But could that end up hurting black homeowners in the long run? It's hard to say.