https://communities.sas.com/t5/SAS-Procedures/a-question-for-panel-data/m-p/67383#M19268 I am using Proc panel to regress an unbalanced panel data. I wonder before doing random effect vs fixed effect choice, do I need check heteroskedasticity and autocorrelation? If I need test them, which options in proc panel can help to correct them? Some people say proc panel can automatically give the best estimate. Is it true? Thank you. Tue, 30 Dec 2008 03:51:26 GMT deleted_user 2008-12-30T03:51:26Z https://communities.sas.com/t5/SAS-Procedures/a-question-for-panel-data/m-p/67383#M19268 I am using Proc panel to regress an unbalanced panel data. I wonder before doing random effect vs fixed effect choice, do I need check heteroskedasticity and autocorrelation? If I need test them, which options in proc panel can help to correct them? Some people say proc panel can automatically give the best estimate. Is it true? Thank you. Tue, 30 Dec 2008 03:51:26 GMT https://communities.sas.com/t5/SAS-Procedures/a-question-for-panel-data/m-p/67383#M19268 deleted_user 2008-12-30T03:51:26Z