The OUTEST= data set is made up of one row (with _TYPE_=‘PARM’) containing each of the parameter estimates in the model. 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 COUNTREG 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.