RE: Probabilistic model

From: Kenneth Kowalski Date: May 13, 2005 technical Source: cognigencorp.com
From: "Kowalski, Ken" Ken.Kowalski@pfizer.com Subject: RE: [NMusers] Probabilistic model Date: Fri, May 13, 2005 1:44 pm Leonid, I've never had much success in fitting ordered categorical models with more than a single eta on the baseline of the logit domain i.e., logit(p) = base + eff + eta. Also, since the logit model transforms the (0,1) probability domain to the real number domain (-inf, inf) the values of theta3 through theta7, could be positive or negative depending on whether the baseline proportions are < or > p=0.5. Thus, I'm not sure why you want to use an exp(eta) on the baseline response. Ken

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May 13, 2005 Leonid Gibiansky Probabilistic model
May 13, 2005 Kenneth Kowalski RE: Probabilistic model
May 13, 2005 Leonid Gibiansky Re: Probabilistic model
May 17, 2005 Vladimir Piotrovskij RE: Probabilistic model
May 17, 2005 Nick Holford Re: Probabilistic model
May 17, 2005 Chuanpu Hu Re: Probabilistic model
May 17, 2005 Vladimir Piotrovskij RE: Probabilistic model
May 17, 2005 Nick Holford Re: Probabilistic model
May 17, 2005 Leonid Gibiansky Re: Probabilistic model
May 18, 2005 Mats Karlsson RE: Probabilistic model
May 18, 2005 Nick Holford Re: Probabilistic model
May 18, 2005 Jeffrey A Wald Re: Probabilistic model
May 18, 2005 Chuanpu Hu Re: Probabilistic model
May 19, 2005 Mats Karlsson RE: Probabilistic model
May 19, 2005 Nick Holford Re: Probabilistic model
May 19, 2005 Nick Holford Re: Probabilistic model
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