I am researching academic publications that study policy debate, and specifically I am looking for any sort of data/research/empirics on marginalized group's participation/success in policy debate (eg. my ideal article would be a somewhat recent survey of the structural trends preventing lower income/disabled/black/queer/female from the same kind of participation/success affluent white males enjoy in the activity with data and context on that situation) that I can use for evidence. In fact, it doesn't necessarily have to be a peer reviewed source, but then it ought to come from a qualified source. I noticed that community familiar Dr. Shanara Reid-Brinkley has been published in a journal called Argumentation and Advocacy by the American Forensics Association, which does contain some useful articles, but are either a.) not in the context of competitive debate or b.) decades old and not relevant to the changing culture of debate. Also note that my argument is less interested in explicit theory (eg. Wilderson/Black Ontology applied to Debate) and more interested in actual data/experience.
I apologize if this question has already been properly addressed on Cross-x, however I could not find it.
Best and appreciate the help,