Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-09 Thread Sören Vogel
Subject: Re: [R] Different LLRs on multinomial logit models in R and SPSS On Jan 7, 2011, at 8:26 AM, sovo0...@gmail.com wrote: On Thu, 6 Jan 2011, David Winsemius wrote: On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-07 Thread sovo0815
On Thu, 6 Jan 2011, David Winsemius wrote: On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs is indeed important when it comes to calculation of

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-07 Thread David Winsemius
On Jan 7, 2011, at 8:26 AM, sovo0...@gmail.com wrote: On Thu, 6 Jan 2011, David Winsemius wrote: On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs

[R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread Sören Vogel
Hello, after calculating a multinomial logit regression on my data, I compared the output to an output retrieved with SPSS 18 (Mac). The coefficients appear to be the same, but the logLik (and therefore fit) values differ widely. Why? The regression in R: set.seed(1234) df - data.frame(

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread David Winsemius
On Jan 6, 2011, at 11:06 AM, Sören Vogel wrote: Hello, after calculating a multinomial logit regression on my data, I compared the output to an output retrieved with SPSS 18 (Mac). The coefficients appear to be the same, but the logLik (and therefore fit) values differ widely. Why? The

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread Ben Bolker
Sören Vogel sovo0815 at gmail.com writes: Hello, after calculating a multinomial logit regression on my data, I compared the output to an output retrieved with SPSS 18 (Mac). The coefficients appear to be the same, but the logLik (and therefore fit) values differ widely. Why? Since

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread Sören Vogel
Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs is indeed important when it comes to calculation of Pseudo-R-Squared-s. If Rnagel devides by (some transformation of) the actiual value of llnull then any

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread David Winsemius
On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs is indeed important when it comes to calculation of Pseudo-R-Squared-s. If Rnagel devides by (some