Title

covconc -- gini and concentration coefficients

Syntax

covconc
yvar
[if] [in]
[weight]
[, rank(rvar)]

yvar is an income variable.

rvar is a ranking variable.

pweights are allowed; see weight.

Description

covconc estimates the concentration index
(Van Kerm, 2009) of an income variable
yvar, given a ranking variable rvar.

Options

rank(varname)
specifies the ranking variable in the concentration index's calculation.
The default value is yvar. So, if this option is not specified,
covconc will calculate the gini index.

Stored results

covconc stores the following in r():

Scalars

r(gini)
gini index (if the ranking variable is omitted).

r(conc)
concentration index (if the ranking variable is provided).

References

Van Kerm, Philippe. 2009.
Generalized Gini and Concentration coefficients
(with factor decomposition) in Stata.
MeDIM Project,
(Advances in the Measurement of Discrimination, Inequality and Mobility),
Luxembourg.