I am working on a website that will precisely do this! I want to create factors that will show citation rings and self citation ratios! Trying to figure out what to call the metric, my current favourite is CJ factor!
Cool of you to do this, though I wonder if this will be more of a measure of community size. Smaller niche topic communities probably behave more like citation rings (you'd cite everyone else in the community frequently). It also seems like it'd penalize people working in a new area (like if you're the first person to use a method, you'd probably cite yourself a bunch).
I will try my best to control for field specific practices for sure, the RCR metric published by NIH is already a good starting point in this regard. Valid point about not penalising people in new fields, will keep that in mind!
