I was thinking of clustering. If you have a large group of people in a general income sub-group then it would weigh more than fewer people in another income sub

I was thinking of clustering. If you have a large group of people in a general income sub-group then it would weigh more than fewer people in another income subgroup. The point of weighing is that margin-based models depend heavily upon a large consumer base and only certain consumer bases are of any significant size.