Is anyone aware of any studies about which types of players -- e.g., low handicap v. high; older v. younger; men v. women; etc. -- are better at helping maintain the course through steps like fixing ball marks, repairing divots, raking traps, and adhering to rules about cart and foot traffic? At my course, at least, it seems like everyone blames a group they're not in, and I'm just curious if anyone has tried to figure this out in a systematic way.