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st: Re: RE: RE: -forval- with -inequal7-


From   "Zurab Sajaia" <zsajaia@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: RE: RE: -forval- with -inequal7-
Date   Tue, 15 Jul 2008 10:44:57 -0400

Hi Lola,

I've just noticed this tread. For similar problems (when you want to generate inequality measures for subgroups) I wrote -egen- extensions replication most (or all) indices produced by -inequal7-

try, findit egen_inequal

so once you download it you can simply code:

egen gini = inequal(income), by(date) weights(wei) index(gini)

or even simpler:

egen gini = gini(income), by(date) weights(wei)

Hope this helps,
Zurab





----- Original Message ----- From: "Andreas, Peichl" <a.peichl@wiso.uni-koeln.de>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, July 15, 2008 7:49 AM
Subject: st: RE: RE: -forval- with -inequal7-



Hey Lola,

These do work when limited to 'consecutive' dates (eg 19901/19904), the >problem arises when they span 'missing' dates as there is no 19905. The >programme runs and calculates the gini for the dates up until a 'missing' >date and then stops with an error. This is not a problem with other >commands using the same dataset, but has arisen with -inequal7-.
The problem is that not all dates exist and inequal7 returns an error message when you try to use it on a zero obs subsample.

You could follow Nick Cox's advice and have a look at:
http://www.stata.com/support/faqs/data/foreach.html

or use capture to avoid Stata stopping with an error:

g gini=.
qui forval i = 19901/20071 {
capture inequal7 income [fw=wei] if date==`i', returns
replace gini=r(gini) if date==`i'
}


Cheers,
Andreas

-------------------------------------------------
Dr. Andreas Peichl
Cologne Center for Public Economics
University of Cologne
Chair Prof. Dr. C. Fuest
Albertus-Magnus-Platz
50923 Köln (Cologne), Germany
-------------------------------------------------
Tel.: +49 (0) 221 470 6201
Fax: +49 (0) 221 470 5060
Email: a.peichl@uni-koeln.de
http: www.cpe-cologne.de
http://www.wiso.uni-koeln.de/ASPSamp/fuest/home/index.asp?l=15&wh=peichl.asp&ID_mitarbeiter=6
-------------------------------------------------
View my research on my Author page:
http://ssrn.com/author=678886
http://econpapers.repec.org/RAS/ppe202.htm
-------------------------------------------------



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