Dear R userers,

I am running truncated regressions with the 'truncreg' package. My sample 
is large (6,000 observations), the data is left-truncated at 1 and the 
left tail of the data is heavily centered at 1. When I am running the 
regression I receive the following error message: 

  Error in optim(par = start[!fixed], fn = logLikFunc, control = control, 
: 
  initial value in 'vmmin' is not finite

>From a previous discussion (
http://r.789695.n4.nabble.com/betareg-help-td3350129.html) on a similar 
issue in the betareg function I assume that the error message stems from 
that the estimate of the starting value of the precision parameter is 
negative. However, I do not know how I can take care of this. Thus I would 
be very thankful for any help.

Best regards,
Philipp 
        [[alternative HTML version deleted]]

______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Reply via email to