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Re: st: how-to calculate beta, standardized coefficients using svy regress?


From   Richard Williams <Richard.A.Williams.5@ND.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: how-to calculate beta, standardized coefficients using svy regress?
Date   Tue, 03 Jul 2007 11:04:22 -0500

At 09:43 AM 7/3/2007, Steven Samuels wrote:
"findit spost9" will find the -spost9- package. It includes the - listcoef- command, which will show betas standardized for X, for Y,
and for both.
listcoef seems to get broken in Stata 10. In Stata 9, this sequence works fine:

webuse nhanes2f
svy: reg weight age
listcoef

But in Stata 10, the same commands give this error:

Unknown function index()
r(133);

I'll email Scott Long about it. I don't know if his programs need updating or if there is a bug (with version control?) in Stata 10.

A little more tedious, but I think you could also standardize yourself:

webuse nhanes2f
svy: reg weight age
center weight age [aw=finalwgt] if e(sample), standardize
svy: reg c_weight c_age

You need to install -center- first (available from ssc). And, unless you have no missing data, you may have to do the centering each time for each regression.

The usual caveats about standardized coefficients being the work of the Devil continue to apply. There may also be additional concerns about using them with svy.

-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: Richard.A.Williams.5@ND.Edu
WWW: http://www.nd.edu/~rwilliam

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