On Non-welfarist Social Ordering Functions

Th e In st it u t e of E con om ic Resea r ch H it ot su ba shi Un iversity Ku n it a ch i, Tokyo, 186-8603 J a pa n Summary. In this paper, criticizing the welfarist's framework in traditional welfare economics which provides a rather limited perspective for social evaluation, we propose a more comprehensive framework in which extended social ordering functions (ESOFs) are introduced. In this framework, not only welfaristic values, but also non-welfaristic values can be treated appropriately. Then, we examine the possibility of non-welfarist ESOFs which meet a value of Individual Autonomy, a criterion of non-welfairst distributive justice, and the welfarist Pareto principle. First, there is no first best ESOF in the sense that the above three axioms are satisfied simultaneously. Second, however, we can show the existence of some second best ESOFs, using a weaker lexicographic application method.