This paper discusses the problems in interpreting the correlation coefficient as a measure of geographical accessibility to public services by income groups. As an alternative a relative index is proposed which incorporates the unique limits to the correlation coefficient in any area and thus...

We investigate the nature of competitive equilibrium for brands competing in a multi-attribute product space when consumer preferences for product attributes follow nonuniform distributions. We establish subgame-perfect equilibria in a two-stage game, where firms choose positions in the first...