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st: Re: RE: matching in Stata


From   "Oleksandr Shepotylo" <shepotil@econ.umd.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: RE: matching in Stata
Date   Wed, 17 Sep 2003 12:21:21 -0400

Dear Chih-Mao,

-merge is not good because even though two samples are form the same
population they have different observations and can not be matched
perfectly.

My problem can be demostrated with the following example:

Dataset1:
person   age  gender  region income
1             20    M        MD     10,000
2             45     F         CA     100,000

Dataset 2:

person     age  gender  region   income
1              23    F         DC            ?
2              35    M        TX            ?

I need program that will match people based on age gender region
and will set income in dataset2 based on closest match from 1.

Oleksandr.


----- Original Message -----
From: "Chih-Mao Hsieh" <Hsieh@olin.wustl.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, September 17, 2003 11:56 AM
Subject: st: RE: matching in Stata


> Dear Oleksandr
>
> I would imagine that -merge- is what you're looking for, maybe with a
couple -gen- commands along the way.  What is ultimately done will depend on
what you intend to do with all the "extra" observations in X2 (whether you
still want to match those, or you have a rule to leave some unmatched).
>
> Chihmao.
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu on behalf of Oleksandr
Shepotylo
> Sent: Wed 9/17/2003 10:01 AM
> To: statalist@hsphsun2.harvard.edu
> Cc:
> Subject: st: matching in Stata
>
>
>
> Dear Statalist,
>
>   Is there any Stata procedure that will match observations from 2
different
> datasets drawn from the same population.
>   Let's say, I have  datasets X1=(x,y) and X2=(x). I want to construct
> X2*=(x*,y) based on mathching observations with closest x's. Also, since
X2
> has more observations correspondence
> should not be  1 to 1.
>
> Thanks,
>
> Oleksandr.
>
>
>
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