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st: ratio of part time workers


From   peter harper <pharper11@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: ratio of part time workers
Date   Mon, 12 Jun 2006 14:07:54 +0000 (GMT)

Thanks. David. I also looked at that, as I have a variable called zallemps, which is the total employment on the payroll at the establishment. But when I tried both forms of denominator I got 
 
. gen ratioprtwrk=(zmalprta+zfemprta) / (zallemps)
(40 missing values generated)
. su ratioprtwrk
    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
 ratioprtwrk |     22411    .0631298    .1019029   .0002026         .8
 
. gen ratioprtwrk=(zmalprta+zfemprta) / ((zmalfulla+zfemfulla+zmalprta+zfemprta))
(40 missing values generated)
. su ratioprtwrk
    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
 ratioprtwrk |     22411    .5385854    .0624591   .3333333   .6666667
 
I am pondering as to why there is a difference.
 
Thanks


 
I would add, that you may want to look, instead at the ratio...

  (zmalprt+zfemprt) / (zmalfull+zfemfull+zmalprt+zfemprt)
that is, the proportion that part-time work represents as compared to 
the total work.  But that's something you need to decide as a 
substantive matter.

--David
 
At 10:58 PM 6/10/2006, you wrote:
>On 6/11/06, peter harper <pharper11@yahoo.co.uk> wrote:
>>Dear Statalisters
>>
>>Since the ratio of part time work, would be
>>the total of the part-time work (i.e., of the both
>>genders) over the total of the full time work of both
>>the genders, I presume I do
>>[...]
>gen ratioprtwrk=(zmalprt+zfemprt) / (zmalfull+zfemfull)
>
>Neil
>[...]
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