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Re: st: benchmarking + determine the peers


From   "Eva Poen" <eva.poen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: benchmarking + determine the peers
Date   Tue, 30 Sep 2008 15:55:29 +0100

OK, but didnt' you receive the email (direct or digest)?

Here are the archives of statalist:
http://www.stata.com/statalist/archive/. Please also see the statalist
faq, where this is mentioned.

You can click on a month to see a list of messages in that month, or
type in a search keyword.

The link to my answer on Saturday is
http://www.stata.com/statalist/archive/2008-09/msg01276.html .

Eva

2008/9/30 Bastian Steingros <Steingros@gmx.de>:
> Dear Eva,
> I can not find my posted example on the Internet, so I thought the mail did not reach you and your colleagues.
>
> How can I see my question in the Internet? I mean how can I see a website like:
> http://www.stata.com/statalist/archive/2007-10/msg00807.html
>
> When entered my name and the keyword stata or peer in google, I have found nothing...
>
> Markus
>
>
>
> -------- Original-Nachricht --------
>> Datum: Tue, 30 Sep 2008 15:41:49 +0100
>> Von: "Eva Poen" <eva.poen@gmail.com>
>> An: statalist@hsphsun2.harvard.edu
>> Betreff: Re: st: benchmarking + determine the peers
>
>> You posted exactly the same question on Saturday, and I replied. If
>> you still have problems, tells us where exactly.
>>
>> Eva
>>
>>
>> 2008/9/30 Bastian Steingros <Steingros@gmx.de>:
>> > Dear Stata users,
>> >
>> > I am searching a function in stata to program peer groups.
>> > In my benchmarking study about American industries I want to compare
>> companies by its sales, earnings etc.
>> > I use the three digit industry code to classify the industries
>> (sic-codes). The peer group must be within the same industry.
>> > Here, the purpose is to compute the mean or median of the sales and to
>> see if the respective firm's performance  is below or above the mean or the
>> median.
>> >
>> > But, the peer group of firm X contains all the companies with the same
>> digit code but *not* firm X (otherwise I would compare X with itself)
>> >
>> > To conclude:
>> >
>> > year   sic-code firm  sales mean median
>> > 1990   333         X      10     ?         ?
>> > 1990   333         Y      20     ?         ?
>> > 1990   333         Z      30     ?         ?
>> > ---------------------------------------------
>> > 1990   334         A      21     ?         ?
>> > 1990   334         B       5      ?        ?
>> > ---------------------------------------------
>> > 1991   etc. ...
>> >
>> > so, in 1990
>> > the peer group mean/median for X must contain (20+30)  but not 10
>> > the peer group mean/median for Y must contain (10+30)  but not 20
>> > the peer group mean/median for Z must contain (10+20)  but not 30
>> > and so on...
>> >
>> > is there a way to program is stata something like:
>> >
>> > by year sic-code, sort: egen median/mean *without the sales of the firm
>> X / firm Y etc.*
>> >
>> > (Please note, it is basically more important for me to obtain the
>> *median* than the mean peer group due to the outlier problem of the mean
>> function.)
>> >
>> > So, please help me find a solution to the median peer group first.
>> >
>> > Many thanks in advance!
>> >
>> > Bastian
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