In this paper, the authors describe a general summary measure of multidimensional inequality and present an example of its use in the context of industrial organization research. Several possible applications are suggested. Copyright 1988 by Blackwell Publishing Ltd

A number of studies have found a positive relation between market share and profitability. Michael Porter argues that this need not hold when small firms find strategic niches protected by mobility barriers. This paper examines that hypothesis by comparing the profitability of large and small...