The ODS SELECT statement specifies that output objects named ParameterEstimates should be sent to all open ODS destinations that do not specifically exclude them. The Listing destination is open by default, and its default list is SELECT ALL. The ODS HTML statement has opened the HTML destination, and its default list is also SELECT ALL. Thus any object that is named ParameterEstimates will go to both these destinations. The PERSIST option specifies that ParameterEstimates should remain in the overall selection list until the list is explicitly modified.
ods select ParameterEstimates(persist);