This function computes fractional ranks which are required for the S-Gini coefficient.
Usage
frac.ranks(x, w = NULL)
Arguments
x
a vector with sorted income values.
w
a vector of weights.
Value
returns the fractional ranks.
References
van Kerm, P. (2009): sgini - Generalized Gini and Concentration coefficients (with factor decomposition) in Stata', CEPS/INSTEAD, Differdange, Luxembourg.