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Re: st: Reclink: high matching score, but no match


From   Michael Blasnik <michael.blasnik@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Reclink: high matching score, but no match
Date   Wed, 28 Dec 2011 11:49:01 -0500

It looks like this is a bug -- is student_name numeric?  If not, you
may want to try encoding it and trying again.  If that isn't the
problem, it might be best if you either send me the data or a trace
log off-list to see if i can figure it out, but I may not get a chance
to figure it out until after the holidays.

Michael

On Sat, Dec 24, 2011 at 4:10 PM, Devra Golbe <dgolbe@gmail.com> wrote:
> I am using  Michael Blasnik's reclink (from SSC) to match records.  I get
> extremely high matching scores, and yet the records do not match.  Can
> anyone help?    My code and relevant output are pasted below.
>
> Thanks and happy holidays,
> Devra
>
> ******
> . sort lname fname
>  . gen idmaster=_n
>  .tempfile ps1a
>  .save `ps1a', replace
>  . clear
>  .use roster100f11Sep7.dta
>  .sort lname fname
>  .save, replace
>  .clear
>  .use `ps1a'
>
>  .reclink lname fname using roster100f11Sep7.dta, ///
>   idmaster(idmaster) idusing(student_name) gen(link)
>
> 0 perfect matches found
>
>
> Added: student_name= identifier from roster100f11Sep7.dta   link = matching
> score
> Observations:  Master N = 26    roster100f11Sep7.dta N= 182
>  Unique Master Cases: matched = 0 (exact = 0), unmatched = 26
>
> .list link _merge in 1/5, clean
>
>         link   _merge
>  1.   0.9933        1
>  2.   0.9933        1
>  3.        .        1
>  4.   0.6420        1
>  5.   0.9988        1
>
> _______
> Devra Golbe
> Professor of Economics
> Hunter College, CUNY
> NY, NY
> *
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