In order to fit multilevel model (HLM) in 3 level analysis can I select only one unit of analysis at level 2.
I mean to say that can i proceed in this way
(level 1)= students= 20 (From each school) (level 2)= teacher = 01 (from each School) (level 3)= schools= 50
or should it be better to exclude teacher from level 2 and thus
(level 1)= students= 20 (From each school) (level 2)= schools= 50.