Abstract
Gini's concentration ratio G is formulated in terms of a cumulative distribution function. The formula is quite simple and makes it easier to calculate values, as well as to investigate the usefulness of the ratio. In addition, a kind of Moment Problem is raised concerning Drewnowski's equality index D which is defined as D=1-G. An application of the formula to life tables showed that the index worked effectively as to measure equality of length of life. Numerical quadrature is briefly discussed for an approximation of the calculation in the use of life tables.
