This paper shows that, in a partially welfarist framework that permits discounting, per-period social evaluations can be consistent with a timeless social ordering only if social principles lead to the repugnant conclusion. The same result applies if per-period social evaluations are replaced by...

This paper provides a survey of normative approaches to inequality measurement, to be published as a chapter in a volume of income inequality. We present general methods for deriving ethical inequality indexes from social-evaluation orderings such as the Atkinson-Kolm-Sen and Kolm procedures.

This paper analyzes variable-population social-evaluation principles in a framework where outcomes are uncertain. In a static model, we provide characterizations of expected-utility versions of Critical-Level Generalized Utilitarian rules.

We examine the possibilities of extending Sen's taxonomy of fixed-population information assumptions regarding the measurability and interpersonal comparability of individual utilities to social-choice problems where the population may very.

This paper examines several families of population principles in the light of a set of axioms. In addition to the critical level utilitarian, number-sensitive critical-level utilitarian and number-dampened families and their generalized counterparts, we consider the restricted number-dampened...

This paper analyses a two-period foreign-aid model where assistance can be given in the form of consumption or population control aid.