Re: st: Parameters returned by -lincom- after -logistic-

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

At 12:34 PM 5/9/2005 +0100, you wrote:
> Hello again (especially StataCorp)
>
> One more query re using -lincom- after -svy- commands in Stata 8. How are 
> the degrees of freedom calculated? I cannot find anything about this on 
> Page 21 of -[SVY]-. I ask because a lot of the examples in -[SVY] lincom 
> for svy- have t-statistics instead of z-statistics, and, as I understand 
> it, the programs -svymean-, -svyratio- and -svytotal- use a method 
> dependent on whether -e(complete)- is -complete- or -available-, with a 
> vector degrees of freedom in the latter case and a scalar degrees of 
> freedom in the former case.
>
> Best wishes
>
> Roger
p. 37 of the Stata 8 svy manual gives returned values and some 
formulas.  e(df_m) and e(df_r) don't quite correspond to the d.f. reported 
by the F stat but I suspect there is some trivial formula that shows the 
relationship.  I know that, in writing my own program, I had to make sure 
e(df_r) was available when svy was used, otherwise I got z's instead of t's 
reported. 
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