Re: st: RE: not uniquely identified observ in small panel

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 09:42 PM 7/5/2005 +0100, Joana Quina wrote:
> Thanks for replying. I am sorry for the mix up - I was using "width"
> with "xtdes" and not with "duplicates".
>
> Here is what I typed and the output:
>
> . duplicates report
>
> Duplicates in terms of all variables
>
> --------------------------------------
>    copies | observations       surplus
> ----------+---------------------------
>         1 |          128             0
> --------------------------------------
0 surplus means no duplicates.  If you had duplicates, you would see 
something like

. list

     +------+
     | var1 |
     |------|
  1. |    1 |
  2. |    2 |
  3. |    2 |
     +------+

. duplicates report

Duplicates in terms of all variables

--------------------------------------
   copies | observations       surplus
----------+---------------------------
        1 |            1             0
        2 |            2             1
--------------------------------------

The labeling may be a little confusing, but see the help for -duplicates-. i.e.

duplicates report produces a table showing observations that occur as one 
or more copies     and indicating how many observations are "surplus" in 
the sense that they are the second     (third, ...) copy of the first of 
each group of duplicates.


-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
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