This sounds like
number in group * Gini mean difference * 2
As the second L-moment is
Gini mean difference / 2
-lmoments- from SSC will get you most of the way
there.
For example,
lmoments varname, by(group) gen(n=n sad=l2)
replace sad = 4 * n * l2
Check this out with hand-calculations for a toy example.
Nick
[email protected]
Julio E
> I am interested in computing the sum of the absolute value of
> all possible
> differences within a group of my sample.
>
> Suppose that the variable "group" denotes the variable
> indicating the group
> to which an individual belongs and Y is an outcome variable.
> I am interested
> in computing
>
> sum of abs (Yi-Yj) for all i and j belonging to group K
>
> My programming skills are almost none. Can somebody help me
> out regarding an
> efficient way of computing such statistic?
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
