Thanks Nick for providing the likely reference of the article.
Kind Regards,
Carlo
-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Nick Cox
Inviato: marted� 28 agosto 2007 18.29
A: [email protected]
Oggetto: st: RE: R: Comparison in survival analysis
This request seems to have been overlooked. Some detective work identifies
Govind S. Mudholkar; Deo Kumar Srivastava; Georgia D. Kollia.
1996.
A Generalization of the Weibull Distribution with Application to
the Analysis of Survival Data.
Journal of the American Statistical Association
91: 1575--1583.
as the likely reference.
Nick
[email protected]
Carlo Lazzaro
> KHAN,ALI wrote:
>
> For the same data set,the estimated parameters(two
> parametrs,alpha and beta(slope)) by weibull and
> loglogistic models narrate a different story(having
> different signs).How do the parameters of two
> distribiutions can be compared?
>
> The generalized weibull of Mudholkar,et al.(1996)
> provides much greater flexibilty at the expense of an
> additional shape parameter(having two shape parameters
> and in total three parameters).How do we can estimate
> this three parameter weibull distribution.
> I have two suggestions concerning your question:
>
> - please take a thorough look at Stata manual Survival analysis and
> epidemiological table, section streg - Fit parametric
> survival model (a
> possible answer to your question stays in page 238 of the
> Release n 9 of the
> abovementioned Stata manual - Table 2);
>
> - in order to be more likely to get an appropriated answer, it is
> appreciated to give the full reference of the article you quote
> (Mudholkar,et al.(1996)).
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