Economic value of black neighborhoods... lack thereof make it easier for them to set up shop (easier to obtain loans, lower rents, more profits through exploiting the business model because black neighborhoods are deprived of their own shops to help their communities like grocery stores and insurance companies).
Then you gotta look at unemployment rate demographics and salaries. Economic deprivation within the community and outside of the community has a two-fold effect on the entire group. So when them folks practice employment discrimination, they make it easier for folks to set up shop 'cause the value of the neighborhood ain't goin' up ('cause if you ain't workin' to put equity in ya property, the block suffer). Dodgy property appraisal keep our property values lower too, so you gotta see when them people get them small business loans, start up costs is low 'cause the assessed value in the area low...
After they set up businesses and attract business from all over the city, the businesses inflate the surrounding property value and black people get priced out... 'cause then all of a sudden the property value of the business get assessed.
And because grandma and 'nem either put the house in a reverse mortgage or the heirs don't want the property or move away, the family home get sold at a "discount".
Somethin' like that.
Solution: get with you a couple black people with a business model and some money to put the block, and community, back together and teach the youth how to hold and control property, make a business for themselves in the community to build the community and protect it.
Edit: this thread got some great info: