Re: st: data management

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

At 10:15 AM 2/18/2004 +0000, R.E. De Hoyos wrote:
> Is there any way I can use weights without including
> it in the tabstat command? I want to run a bunch of
> summary table, would like to use weights for all of
> them.
>
> Try the svy commands (help -svy-). You can set different weights
> using -svyset- and once you've done this Stata will use them as long as you
> use the prefix -svy- with other valid commands. For example you can
> use -svytab- or -svysum- and it will give you two-way tables and summary
> statistics of survey data (or other type needing re-weighting) respectively.
Good idea for many cases -- but in this case the desire was to use 
aweights, which are not included in the svy commands, are they?

To educate myself here -- In practice, am I correct in saying that using 
the svy commands would force the use of robust standard errors, whereas you 
would not need to use robust standard errors if you used the aw parameter 
on each separate command?

Put another way, am I correct in saying that

[aw = wgt], robust

and

[pw = wgt]

and

[pw = wgt], robust

all produce the same results? i.e. aw and pw basically do the same 
adjustments, but pw forces the use of robust standard errors?

Of course, for something like tables, maybe it doesn't really matter 
whether you use aw or pw, i.e. if he uses the svytab command using pw=wgt, 
he'll get the same results as if he had used tabstat with aw = wgt?

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Richard Williams, Notre Dame Dept of Sociology
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