Join Date: May 2006
Thank you for your response Mickey.
I am currently I am in the middle of one of my periodic work cycles, I do not have time right now to spend much, if any, time on trying to give you a halfway acceptable answer to your question. My gut feeling is that there is no answer.
I know of no research on this subject, and the period when any such hierarchical stratification might have applied is long past. But I might be able to dig up something. If I can, I will post what I might find here.