The authors investigate the consequences of imposing additivity on community preferences. They show that there are import ant implications of additive community preferences that are not implied. by the additivity of a single consumer's preferences. In particular, th ey show that imposing...

The phenomenon of income polarization is generally associated with a disappearing middle class but there does not seem to be a generally accepted definition of this notion. We characterize classes of polarization quasi-orderings and polarization measures in a framework where there are two income...