www.cmm.bristol.ac.uk/forum

That explains everything. Thank you very much!

Feifei

Hi Chris,

Thank you for replying so promptly. Strangely, 'runmlwin, rrr' and 'lincom (or nlcom)' give the some relative risk ratios if I use MQL1. The problem occurs if I use MCMC.

use http://www.bristol.ac.uk/cmm/media/runmlwin/bang, clear
generate lc1 = (lc==1)
generate lc2 = (lc==2)
generate ...

Hi,

I used the 'rrr' option to get the relative risk ratios after 'runmlwin' (for a multinomial response model). I realize that it gives different results compared with 'exp()' and 'lincom'. The differences are not really negligible , for example 0.6376 vs. 0.6277. Any idea why? Thanks!

Feifei

Finally, get it work (by checking the determinants) !!!
Thank you for your help

Thanks, Chris.
I manually changed the variance and covariance in the b matrix.


matrix drop _all
matrix b = e(b)
matrix V = e(V)
*
matrix b=b[1, 1..21]
matrix b[1,12]=-0.127
matrix b[1,13]=0.14
matrix b[1,14]=-0.16
matrix b[1,15]=0.202
matrix b[1,19]=-0.236
matrix b[1,20]=0.939
matrix V=V[1..21 ...

Thank you for your reply, Chris. Following your suggestion, I tried to alter the 0 covariances in the b matrix. But my matrix algebra knowledge is rather limited, so it is not clear to me how I can alter the corresponding elements in the V matrix. Could you give an example? Thanks a lot!

Thank you very much for your help, Chris! It works! Just to be sure I get it right, still using the the help file example:


use http://www.bristol.ac.uk/cmm/media/runmlwin/bang, clear
generate lc1 = (lc==1)
generate lc2 = (lc==2)
generate lc3plus = (lc>=3)

runmlwin use4 cons lc1 lc2 lc3plus ...

Hi all,

I have a two-level multinomial model. After fitting my model using MQL1, I want it fit it by MCMC. However I get the following error message:
“error while obeying batch file C:\user… at line number 2183: MCMC 0 500 1 5.8 10 C1411] C1412] 2 2 2 1 1 6”

After reading the materials online, I ...

I think my problem is rather similar. I have a two-level model with missing unordered categorical variables. The imputation seems to work just fine. But I get error messages when the imputation is done. And no imputed data file is saved. The error message is attached. Thanks!

Now I get it! It indeed takes quite a while. Thanks very much!