Re: st: mixlcov, sd error message

[William Buchanan <william@williambuchanan.net>]

Without my Stata handy to check documentation, have you checked to see if the command allows you to specify the number of iterations it will attempt to see if the model converges?  Also, have you tried using this with a simplified model (e.g., fewer or no covariates)?  If you're using seven random coefficients (in the mixed effects sense of a random coefficient) you likely should simplify your model considerably and build it up to determine which of the random coefficients is the source of the difficulty.  

HTH,
Billy

Sent from my iPhone

On Jul 16, 2013, at 6:19, Jessica Boatwright <jbhokie1@vt.edu> wrote:

> I am trying to use the "mixlcov, sd" post-estimation command after
> running a mixlogit model. I get the error message: "Maximum number of
> iterations exceeded". Here are some details:
> 
> -I am using Stata/IC 10.1
> 
> -I am analyzing results from a choice experiment
> 
> -I have two independent variables with fixed coefficients: one of them
> is the intercept (the intercept equals one if the respondent chose an
> alternative and it equals zero if the respondent opted out); the other
> is my monetary attribute (a continuous variable)
> 
> -I have 7 independent variables with random coefficients (all of them
> are dummy variables)
> 
> Does anyone have any suggestions on how I can get past this error?
> 
> Thank you,
> Jessica
> 
> --
> Jessica Boatwright
> Virginia Tech '13
> Applied Economics M.S. candidate
> 540-529-9469
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