st: heckprob vce command

["Bo Cutter" <wcutter@ucla.edu>]

In the heckprob command instead of estimating rho (the correlation in the
bivariate normal), the procedure estimates
 atanh(rho).  However, the coefficient for rho and atanh(rho) are reported.
Can anybody tell me if the reported vce matrix is for rho or for atanh(rho)
?

Bo Cutter

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