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From | Nick Cox <njcoxstata@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: missing standard error of the constant term in ivprobit model |
Date | Mon, 16 May 2011 01:34:35 +0100 |
On this information: Your model is too complicated. Simplify until this doesn't happen. Look at the correlation structure of your predictors. But the major point is that this is too little information to allow a better answer. No output, no context, no statement of why variables are included in the model. Nick On Mon, May 16, 2011 at 1:15 AM, xueliansharon <xuelianstata@gmail.com> wrote: > Dear all, > > I estimated an ivprobit model with five endogenous variables, I use 12 > instruments to address the endogeneity, but I always get missing standard > error in the constant term, no matter which convergence technique (bfgs, > dfp, etc) I use. Does anybody know the reason and solution to such missing > standard error problem? > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/