RE: st: RE: RE: Stata formulas

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

At 06:28 PM 2/28/2007, Nick Cox wrote:
> Your last comment has already been answered several times
> over in this thread. Like it or not, StataCorp has invested
> a vast amount in its documentation for sale and wholesale
> duplication of the manuals for open access just is not
> likely. We can all agree that it would be useful if it
> were there, but it is not going to happen. That's my
> guess, at least.
A few sample chapters do happen to be online (clogit, mfx, regress, 
regress postestimation), just in case those luckily are the ones you 
want (or if you want a sampling to see if it is worth buying the whole thing):

http://www.stata.com/bookstore/refset.html


> Besides, your argument is contradictory. If StataCorp
> is using the same formulas as everybody else, then they
> can be found in the open literature.
Quite true.  It isn't like Stata has a patent on the formula for 
logistic regression.  Of course hunting all the formulas down could 
be time-consuming.

For what it is worth, the great Satan does put its algorithms 
online.  When prompted for username and password, enter "guest" in both places.

http://support.spss.com/Tech/Products/SPSS/Documentation/Statistics/algorithms/index.html

I imagine Stata is often using the same or equivalent formulas.  The 
SPSS stuff may be free, but for me at least, the Stata documentation 
is infinitely clearer.


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Richard Williams, Notre Dame Dept of Sociology
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