An optimal linear world income tax that maximizes a border-neutral social welfare function provides a drastic reduction in world consumption inequality, dropping the Gini coefficient from 0.69 to 0.25. In contrast an optimal decentralized (i.e., within countries) redistribution has miniscule...

Polarization is a concept which is defined over the distribution of income. It is clear that it does not fit into the framework of the traditional Bergson-type Social Welfare Function. The aim of this paper is to investigate whether the concept can fit into the framework of the theory of...

This paper proposes a social welfare framework in which to analyze the relationships between growth, trends in inequality, mobility, and social welfare. An application of the framework to worldwide and regional data on per capita GDP suggests a lack of convergence at the world level, opposite...

Received migration research has it that higher relative deprivation strengthens the incentive for people to migrate, and that migration is often a risky enterprise. Relative deprivation has been seen as a push factor in migration, and the level of risk involved in migration has been understood...