Comparing Bentham to Posner
(1)Anomalies under Bentham: Under the Posner theory, property is something that has value, not just what is legally defined as property as under Bentham, but from what people hold as having value. There are several cases of items treated as property without law, such as illegal drugs, territories for marketing such, boyfriends and girlfriends. Here no property right exists but people treat it as such either by enforcement of societal values or by fear of retaliation.
(2)Anomalies under Posner: Transferability frequently measures more how much a person wants something, we being non-rational operators, than how efficiently we will do so. Transferability of some items actually induces inefficiencies, such as those which are merit based. If you could transfer law school admissions, you would be measuring who wanted it the most, or who could pay the most for it, and not who could best utilize it.
2.3 Attributes of Ownership
大陆法系的法律以所有权(Ownership)为基础来分析财产和财产权,宣称"一物一权",美国财产法
不像大陆法系那样强调财产的所有权,它重视的是财产权中各种不同的利益和所有权的分割情况(Attributes of Ownership),这些利益常常是指: