That's an excellent question.
I don't have the research at my fingertips, but we know intimate partner violence cuts across all socio-economic classes. Folks at all levels are experiencing domestic violence.
However, we also know that if you have lower financial resources or housing resources, things can get worse. We know that if an abusive person loses work or is dealing with other kinds of stressors, it can increase the violence that's already there. For example, during COVID, we had more calls to domestic violence shelters and heard from more victims.
When things get worse, we know this violence increases. I don't have the research in front of me, but I know it.