I'm at the Workshop in Bloomington listening to an interesting talk by Prof. Derek Kauneckis, a young Political Scientist from the Univ. of Nevada-Reno, on "Re-thinking Mechanisms of Enforcement in Property Rights Institutions." He's looking at the wide spectrum of first- and third-party mechanisms for enforcing property rights in the absence of states. So, he's talking about enforcement by individual resource "owners" and enforcement by the non-governmental "community." Interesting, though I'm not sure how much it adds to preexisting knowledge.
UPDATE: Pace Hohfeld, I cannot abide any model of property rights that does not account for the emergence of property duties.
UPDATE #2: It never ceases to amaze me that such presentations do not attract anyone - not one person - from the Maurer Law School at IU-Bloomington. The Workshop is like a gorgeous flower garden in their own backyard that they simply ignore. Oh well, de gustibus non est disputandum.