If an h.var equation is specified, and the parameters associated with the h.var equation are listed before other parameters on the PARMS statement in PROC MODEL, the parameter estimates in the OUTEST= data set may be incorrect for all estimation methods except GMM and FIML. The estimated parameters associated with the h.var equation may be reported as the parameters associated with the mean equation and vice versa. If the COVOUT option is also specified, the corresponding covariance matrix will also be incorrect.

To circumvent the problem, either specify the parameters associated with the h.var equation last in the parameter list on the PARMS statement or use ODS to output the parameter estimates table to a data set.