[R] Problem with ordered probit model in MASS

[David Duffy]

Justin Bem wrote:

> I got this message, while using the polr function in MASS
> 
> Error in polr(EQ, don, subset = (cote != 0), method = "probit", na.action = na.omit) :
>         attempt for find suitable starting values failed
> 
> how can I initialise starting values ?

You might try running an ordered logistic in lrm() and using those estimates
as starting values (if it runs OK).

David Duffy.