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Re: st: error when using svy probit with xi

From   Amanda Fu <>
Subject   Re: st: error when using svy probit with xi
Date   Fri, 17 Dec 2010 17:16:21 -0500

Hi All,

When I posted the above question, I did not see the discussion in this strand:

Now I think the solution for this error is at least I can switch not
using xi. Just create the dummy variables.

Best wishes,

On Fri, Dec 17, 2010 at 5:08 PM, Amanda Fu <> wrote:
> Dear Statalisters,
> I encouter some problem when estimating a survey probit model. Each
> independent variable will be interacted with the variable "group". So,
> my command is like this:
> . svyset [pw=pw1]
> . xi:svy:probit y*x1 | x2*x3*x4          ,
> where x1,x3,x4 are continuous  x2 is categorical.
> The system gives error information as:
> initial vector: duplicate entries for o._Igroup_1 found
> an error occurred when svy executed probit
> I guess it means there are duplicate dummies in the command. But not
> sure. Any comments or suggestions will be helpful. Thank you!
> Best wishes,
> Amanda

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