Hi all,
When using MU referencing, how do I code the situation where the typical value 
appears to be the same between two groups, but one group is more variable - how 
do I give these two groups different ETAs but essentially the same THETA?

Is this legit?

tvParam=THETA(.)
MU_1=tvParam
MU_2=tvParam

Param1=MU_1+ETA(1)
Param2=MU_2+ETA(2)

Param=Param1*G1+Param2*G2

Where G1 and G2 equal 0 or 1 based on which group the subject belongs.

Thanks for the advice,
Brendan

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