. 2007 Feb 27;4(15):707–719. doi: 10.1098/rsif.2007.0213

Table 2.

Four variants of Δ and links with diversity properties and measures.

property	α	β	equation (9.2): Δ=	equivalents (cf. table 1)	interpretation
variety	0	0	$\sum_{i j} d_{i j}^{0}$	(N²−N)/2	scaled variety
balance	0	1	$\sum_{i j} p_{i} \cdot p_{j}$	(Gini)/2	balance-weighted variety
disparity	1	0	$\sum_{i j} d_{i j}$	(Solow & Polasky 1994a)	disparity-weighted variety
diversity	1	1	$\sum_{i j} d_{i j} \cdot p_{i} \cdot p_{j}$	D	balance/disparity-weighted variety