topic Re: How SAS studio calculates BIC in proc mixed? in SAS Studio

How SAS studio calculates BIC in proc mixed?

johamunoza0 — Thu, 06 Jul 2017 16:19:17 GMT

Dear All,

I am trying to understand the way that BIC is calculated for a mixed model using PROC MIXED, I arrived to the AIC reported by SAS under the ML and REML version.

However when i tried manually to calculate the BIC it seems that it is penalized with a function of log(n^2) instead of log(n), being n the number of subjects.

Could somebody iluminate me how SAS calculates BIC under ML and REML?

I am using the currently studio version,

Thanks a lot for your help

Re: How SAS studio calculates BIC in proc mixed?

Reeza — Thu, 06 Jul 2017 16:41:30 GMT

http://documentation.sas.com/?docsetId=statug&docsetVersion=14.2&docsetTarget=statug_mixed_syntax01.htm&locale=en#statug.mixed.procstmt_ic

Re: How SAS studio calculates BIC in proc mixed?

johamunoza0 — Wed, 12 Jul 2017 12:03:08 GMT

Thanks so much for your reply, i had not considered the 2 in the AIC complexity penalty. Best wishes, Johanna