RE: BOV
From: "Kowalski, Ken" Ken.Kowalski@pfizer.com
Subject: RE: [NMusers] BOV
Date: Tue, September 21, 2004 5:00 pm
Nick,
I need to think about this some more but here is my initial intuition.
Let's say you have n=4 occasions then you can estimate 4 variance components
for total variability corresponding to PPV1 through PPV4. If we then
partition total variability into BSV and BOV where each occasion can have a
different BOV (say BOV1 through BOV4) then we have
PPV1 = BSV + BOV1
PPV2 = BSV + BOV2
PPV3 = BSV + BOV3
PPV4 = BSV + BOV4
Thus, we have 4 equations with 5 unknowns (BSV, BOV1-BOV4) and hence is
over-parameterized. Am I missing something here?
Ken