At least in the case of historic redlining (i.e. where the term came from), we don't have to wonder - there has been a ton of research done on this, and it was

At least in the case of historic redlining (i.e. where the term came from), we don't have to wonder - there has been a ton of research done on this, and it was pretty clearly a racially motivated discriminatory practice. A fact which resulting in, among other measures, the fair housing act in the late 60s....