Decomposes by population subgroups a generalized entropy inequality measure within a vector.
1 
x 
Numeric vector with nonnegative values (strictly positive
when 
z 
Factor who determines the subgroups. 
w 
Numeric vector of sampling weigths (optional). 
alpha 
Parameter of the generalized entropy index. Theil index (TT) is
calculated for 
ELMO 
When 
A list of class "ICI"
with components:
ineq 
a list with components 
decomp 
a list with components 
intra 
a list with components 
ws 
a list with components 
nas 
a list with 
Cowell F.A. (2000) Measurement of Inequality. In Atkinson A.B., Bourguignon F. (Eds.) Handbook of Income Distribution. Elsevier, Vol. 1, pp. 87166.
Elbers C., Lanjouw P., Mistiaen J.A., Ozler B. (2005) ReInterpreting SubGroup Inequality Decompositions. World Bank, World Bank Policy Research Working Paper 3687, 42 p.
calcGEI
1 2 3 4 5 6  data(hhbudgets)
decompGEI(hhbudgets[,"ingreso"], hhbudgets[,"estructura"], alpha=4)
summary(hhbudgets[,"tenencia"]) #35 NA's
decompGEI(x=hhbudgets[,"transporte"], z=hhbudgets[,"tenencia"], w=hhbudgets[,"factor"], ELMO=FALSE)
summary(decompGEI(x=hhbudgets[,"transporte"], z=hhbudgets[,"tenencia"], w=hhbudgets[,"factor"], alpha=1.5))

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