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Hi, Kenny:+ T6 P1 z I6 ? M6 {3 [. }" V
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when we use HLM,there are some paper just report the fixed effect,while most time I use the random effect,so my question is when shall we use fixed or random effect and their difference?
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9 h& \2 G1 ^6 \8 g4 l' _another question is about the ground mean and the group mean, when we test the level 2 model, should we use group mean?can you give some guidance?: b) b7 l" o. [7 Q) X
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Best,
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