Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: ologit maximum-likelihood


From   Jose Maria <jmpsouza@usp.br>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: ologit maximum-likelihood
Date   Mon, 02 Feb 2004 22:09:22 -0200

Richard Gates escreveu:

Given a vector of covariates x and unknown parameters b, the odds for
the event y <= j is k_j*exp(-x'b), j=1,..,m. That is, the odds of observing y less than or equal to category j is proportional to
exp(-x'b). The reported cut points from Stata are cut_j = log(k_j).
. . . . . . . . .
Or . predict poor fair average good excellent
(option p assumed; predicted probabilities)

. table foreign, c(mean poor mean fair mean average mean good mean
excellent)
--------------------------------------------------------------------------------
Car type | mean(poor) mean(fair) mean(aver~e) mean(good) mean(exce~t)
----------+---------------------------------------------------------------------
Domestic | .0407623 .163049 .5703853 .18834 .0374633
Foreign | .0021504 .0106652 .1353087 .4176569 .4342188
--------------------------------------------------------------------------------


I hope this helps.

-Rich
rgates@stata.com

On Sun, 2004-02-01 at 16:35, Jose Maria wrote:


Dear Stata people:
I am at loss to understand better the output of the command -ologit-:
1. is it possible to show me, numerically, using the example of page 475-476 of version6 manual, the property given in
Dear Rich:
thank you very much. Sure it helped. I got, also, some papers from STB and Stata library.
I am reading all carefully.
Regards,
Jose Maria

Jose Maria Pacheco de Souza, Professor Titular
Departamento de Epidemiologia
Faculdade de Saude Publica/Universidade de Sao Paulo
Av. Dr. Arnaldo, 715	cep 01246-904
Sao Paulo	Brasil
fones (11)3082-3886  (11)3714-2403  (11)3768-8612
fax   (11)3082-2920  (11)3714-2403
www.fsp.usp.br/~jmpsouza
jmpsouza@usp.br




*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index