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Re: st: Neumark decomposition


From   Yingge Lin <yingge.lin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Neumark decomposition
Date   Mon, 16 Jul 2012 16:04:28 -0400

Thanks so much Fernando. You are correct that I should have used
-oaxaca- with omega for Neumark decompostion.




On Mon, Jul 16, 2012 at 3:49 PM, Fernando Rios Avila <f.rios.a@gmail.com> wrote:
> Hi Yingge,
> The syntax you are using for the -oaxaca- command is incorrect.
> If you want to replicate the Neumark decomposition you need to use
> oaxaca depvar [indepvars]  , by(groupvar) , omega
> rather than "pooled"
> According to the -oaxaca- help file, the pooled option includes the
> excluded variable (in the syntax the ) in the pooled
> regression. Whereas omega only includes the independent variables
> declared.
> Fernando
>
> On Mon, Jul 16, 2012 at 3:42 PM, Yingge Lin <yingge.lin@gmail.com> wrote:
>>
>> Thank, Nick.
>>
>> The syntax I used is:
>>
>> .oaxaca depvar [indepvars]  , by(groupvar) , pooled
>> and
>> .decompose   depvar [indepvars], by(groupvar) detail estimates
>>
>> From my understanding, using pooled with _oaxaca will generate Neumark
>> decompostion as it used the coefficient from the pooled data
>> regression. And in the detail results that _decompose produced, there
>> is one when D=* is also for Neumark decompostion. I run both program
>> on the same data set but the results are not the same. I wonder
>> whether I misunderstand the program or there is one program might
>> contain error. i hope I could get some feedback from someone who also
>> used those program and see whether same thing happen to them. Maybe
>> someone on the list could help me and point out where I make mistake.
>>
>> Thanks again.
>>
>> Best,
>> Yingge
>>
>>
>>
>> On Mon, Jul 16, 2012 at 3:18 PM, Nick Cox <njcoxstata@gmail.com> wrote:
>> > Yingge Lin:
>> >
>> > Rest assured that Maarten has a long track record of helping many,
>> > many people on this list and also that he and Ben Jann are on entirely
>> > good terms. Maarten did not explain his comment fully, but it is not
>> > necessary to add to his remarks on the episode he mentioned. He was
>> > merely trying to explain that Ben is no longer a member of this list,
>> > so that it follows that you should ask Ben directly about his
>> > programs. Even if users of these programs comment directly, that
>> > remains good advice.
>> >
>> > The Statalist FAQ explains that you should assume goodwill even when
>> > it is not evident. I would summarize Maarten's main advice as that it
>> > is difficult to help you if you do not help yourself by asking precise
>> > questions.
>> > The purpose of such advice is not to shoot you down but to encourage
>> > you to ask precise questions. Despite all that, it remains difficult
>> > to comment on your experiences, including whether you have made
>> > mistakes, as you give no details on exactly what command syntax you
>> > used nor exactly what results you got.
>> >
>> >  I am commenting on your general aspersions; I don't use either of the
>> > commands you mention.
>> >
>> > Nick
>> >
>> > On Mon, Jul 16, 2012 at 7:47 PM, Yingge Lin <yingge.lin@gmail.com> wrote:
>> >> Maarten
>> >>
>> >> Sorry if my question made you uncomfortable, but I think you should
>> >> know that your answer has certainly made me very uncomfortable. I
>> >> thought statalist is a place where people discuss the questions about
>> >> STATA and learn from each other. All I wanted was some feedback from
>> >> those who also have used -oaxaca- and -decompose-, and see whether I
>> >> made mistake or one of the commands have some error. The -oaxaca- and
>> >> -decompose- can be installed by ssc install.
>> >>
>> >> I do not know whether there is anything going on between Ben Jann and
>> >> you, but it was never my intention to waste anybody’s time. But I do
>> >> not appreciate that you tried to accuse me of looking for a shortcut
>> >> only and wasting someone else time. It is untrue, and certainly if you
>> >> felt so strongly that answering my questions was a waste of your time
>> >> or were having a bad day, you really could have just chosen to ignore
>> >> my questions.
>> >>
>> >> Yingge
>> >>
>> >> On Mon, Jul 16, 2012 at 12:13 PM, Maarten Buis <maartenlbuis@gmail.com> wrote:
>> >>> On Mon, Jul 16, 2012 at 5:48 PM, Yingge Lin wrote:
>> >>>> I am using STATA10. Ben Jann also have -oaxaca- for earlier version of
>> >>>> stata (8 and 9). Hope these clarify a little bit of my questions.
>> >>>
>> >>> That was not what I was asking. I asked where you got the user written
>> >>> software from (-oaxaca- and -decompose-), not which version of Stata
>> >>> you were using. However, you should also have told use which version
>> >>> of Stata you were using. Since you did not say so in your original
>> >>> question I assumed, per the Statalist FAQ, you used the most recent
>> >>> (12).
>> >>>
>> >>> I realize that often we want answers quickly, and thus take
>> >>> short-cuts, like not reading the FAQ. But this illustrates that short
>> >>> cuts often lead to more work. If this only meant that you wasted your
>> >>> own time, than that is not so bad: hopefully you have learned
>> >>> something in the process. However, you are also wasting our time.
>> >>> Since you rely on our good will to get answers, wasting our time is
>> >>> not a good idea. So I strongly suggest that you take your time to read
>> >>> the FAQ carefully before posting anything on the list.
>> >>>
>> >>> Anyhow, my answer remains the same: Ben Jann is no longer active on
>> >>> the list (a sad story, involving one of the most dysfunctional periods
>> >>> on statalist), so you need to contact him directly.
>> >>>
>> >
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