Think about all the money black people spend on things like food, clothes, entertainment, electronics, random products, banking, etc. Group economics means buying those goods and services from companies who are black owned, employ majority black people, and do things that support the local black community.
Black people need to spend with black businesses that employ black people. It's that simple.
If group economics means that, its going to fail and it should fail.
If black businessmen are in business only becaue of their race instead of the benefit they can bring potential customers in their products they deserve to fail as well.
I could understand if you were arguing blacks need to give black manufacturers and sellers who have good products at competitive prices a try and abandone the mindset of if blacks make it it must be lesser quality, but to say black only I think that is foolish and economically illiterate.
Blacks can thrive in raw capitalism when we aren't ganged up and loaded down by the white power structure, we saw this even in the slave days where you had some slaves who were able to in that depraved system buy themselves and family out of slavery and compete and best white business men and competitors.
The issue to me is more of a mindset though, we have so many blacks who refuse to even consider services of other blacks because they think their black skin makes them inferior. I've seen this first hand in the IT field where if I try to make a sale to a black business for IT, they look at me like they think I'm running a game on them, and someone white from my same company can come in there upsell them on shyt they don't need and they'll run at it and put money down because he looked the part to them. Think about that mindset, if you can remove that mindset I think you'll see more economic progress from black americans economically, that warped mindset is the main problem IMHO internally, externally we have measures that a lot of blacks support that were designed and currently limit our economic opportunities.