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 vary. It is shown that in order to avoid impossibility...

Sen?s social-evaluation-functional framework is used to reformulate Harsanyi?s social aggregation problem so that both single-profile and multi-profile issues can be considered with allowance made for different assumptions concerning the measurability and comparability of individual utilities....

Principles for the social evaluation of states of affairs with different population sizes, such as Classical Utilitarianism, often lead to the repugnant conclusion. Those that avoid it may have other ethically unattractive features. Average Utilitarianism does not lead to the repugnant...

This paper characterizes an optimal redistribution program when taxation authorities: (1)" are uninformed about individuals' value of time in both market and non-market activities observe both market-income and time allocated to market employment, and (3) are utilitarian. " Formally, the problem...

This paper considers the problem of social evaluation in a model where population size, individual lifetime utilities, lengths of life, and birth dates vary across states. We investigate principles for social evaluation in an intertemporal framework and show that history must matter to some...