Most of the literature on income distribution has concentrated on inequality. In this paper the authors introduce a concern for efficiency in a social welfare model. They propose a simple but useful specification which combines three features: (1) the selection of measurement instruments in the...

The 1990-91 household expenditures distribution in Spain dominates, in the relative ("rightist") Lorenz sense, the 1980-81 distribution, but the latter dominates the former in the absolute ("leftist") Lorenz sense. This situation constitutes a textbook case for intermediate or "centrist" notions...