Parallel regressions in multilevel mo... PreviousNext
Mplus Discussion > Multilevel Data/Complex Sample >
Message/Author
 Lu Gram posted on Sunday, April 10, 2016 - 2:12 am
I'm trying to understand what the between-level regression of Y on X means when we simultaneously have a within-level regression of Y on X. E.g. in the following model:

ANALYSIS:
TYPE = TWOLEVEL;

MODEL:
%WITHIN%
ylifesat ON mwlbal; !Within-level regression of the mediator and outcome

%BETWEEN%
ylifesat ON mwlbal; !Between-level regression of the mediator and outcome
mwlbal ON wctrygendereq;!Between-level regression of the IV and the mediator
ylifesat ON wctrygendereq;!Between-level regression of the IV and the DV;

For me, both between and within-level regression reduce to adding a fixed effect to the regression model, so I don't understand how the model can be identifiable when you have both regressions in the model? But if I remove the between-level regression, Mplus adds a correlation instead.

Thanks for the help!
 Linda K. Muthen posted on Sunday, April 10, 2016 - 9:37 am
When y and x are not put the on WITHIN or BETWEEN list, there is a latent variable decomposition of them into within and between parts which are used in the within and between parts of the model. See Example 9.1 for further information.
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