  The dilemma which remained unsolved using Rao-Stirling diversity, namely of
how variety and balance can be combined into "dual concept diversity"
(Stirling, 1998, pp. 48f.) can be clarified by using Nijssen et al.'s (1998)
argument that the Gini coefficient is a perfect indicator of balance. However,
the Gini coefficient is not an indicator of variety; this latter term can be
operationalized independently as relative variety. The three components of
diversity--variety, balance, and disparity--can thus be clearly distinguished
and independently operationalized as measures varying between zero and one. The
new diversity indicator ranges with more resolving power in the empirical case.
