The HPCOUNTREG Procedure

The OUTEST= data set is made up of at least two rows: the first row (with _TYPE_=‘PARM’) contains each of the parameter estimates in the model, and the second row (with _TYPE_=‘STD’) contains the standard errors for the parameter estimates in the model.

If you use the COVOUT option in the PROC HPCOUNTREG statement, the OUTEST= data set also contains the covariance matrix for the parameter estimates. The covariance matrix appears in the observations with _TYPE_=‘COV’, and the _NAME_ variable labels the rows with the parameter names.