Sustainable recursive social welfare functions
在Koopmans框架下研究了一类可持续递归社会福利函数，用弱公平条件公理化，并指出其一个可分离性条件在伦理上存疑，对研究代际正义和环境管理的学者有参考价值。
What ethical criterion for intergenerational justice should be adopted, e.g., when faced with the task of managing the global environment? Koopmans’ axiomatization of discounted utilitarianism is based on seemingly compelling conditions, yet this criterion leads to hard-to-justify outcomes. The present analysis considers a class of sustainable recursive social welfare functions within Koopmans’ general framework. This class is axiomatized by means of a weak equity condition (“Hammond Equity for the Future”) and general existence is established. Any member of the class satisfies the key axioms of Chichilnisky’s “sustainable preferences”. The analysis singles out one of Koopmans’ original separability conditions (his Postulate 3′a), here called “Independent Present”, as particularly questionable from an ethical perspective.