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Re: st: RE: difference in number of observation in stata and limdep tobit, probit result


From   Richard Williams <richardwilliams.ndu@gmail.com>
To   statalist@hsphsun2.harvard.edu, statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: difference in number of observation in stata and limdep tobit, probit result
Date   Sun, 05 Aug 2012 12:57:23 -0500

If all of these vars are in your model and you are using listwise deletion of missing data, then your maximum N is 6017. Ergo Stata's 5709 cases sounds much more in the ballpark than Limdep's 15,469. I am not sure how Limdep handles missing data, but you'll need to figure that out. If worse comes to worst, create an extract that only has cases with no missing values and use it with Limdep.

At 11:43 PM 8/4/2012, Prakash Singh wrote:
Nick, here is the situation
I have data with total of 15469 observation now when I am running
probit or tobit is stata and limdep the number of observation in the
output table is coming to be quite different. The number of
observation in limdep is 15469 and in stata it is 5709. Below I am
providing the summary statistics of the variable used in regression.



  Variable |              Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
FA | 15469 .2967225 .4568279 0 1
       SALES      |     15469     4459518    2.47e+07        120   1.28e+09
prop_owned~t |      6017    .3051433    .2953013   1.25e-06          1
    dacount2     |     15420    .6050584     .488854          0          1
  dtype_ent1    |     15469    .0637404    .2442978          0          1
-------------+--------------------------------------------------------
  dtype_ent2    |     15469    .4825134    .4997103          0          1
dum_owner_n2 |     15345    .1571848    .3639867          0          1
dum_owner_n3 |     15345    .8165526    .3870455          0          1
dreg2 | 15449 .3852677 .4866742 0 1



Hope I have given sufficient information for getting my query clear.
Regards
Prakash
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