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This paper distinguishes an index ordering and a social ordering function as a simple way to formalize the indexing problem in the social choice framework. Two main conclusions are derived. First, the alleged dilemma between welfarism and perfectionnism is shown to involve a third possibility, exemplified by the fairness approach to social choice. Second, the idea that an individual is better off than another whenever he has more (goods, functionings...) in all dimen- sions, which is known to enter in conflict with the Pareto principle, can be partly salvaged by adopting the fairness approach.

Social choice and the indexing dilemma