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st: missing standard error of the constant term in ivprobit model


From   xueliansharon <xuelianstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: missing standard error of the constant term in ivprobit model
Date   Sun, 15 May 2011 17:15:25 -0700 (PDT)

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?

Many thanks.

Sharon 

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