Discrete-time model with zero varianc... PreviousNext
Mplus Discussion > Structural Equation Modeling >
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 yingchun ji posted on Tuesday, December 05, 2006 - 2:26 am
model:
attd by infertw wrcontr vasm;
ster by ster1-ster54@1;
ster@0;
ster on attd;
*** ERROR
One or more variables have a variance of zero.


Ster is the latent variable of outcome event. Ster1-ster54 are 54 months indicators of the event. It is very common that in a specific time interval, no event occurs to anyone. Then this produces a zero variance variable.
Anyone knows how to fix it?
Thank you so much!
 Bengt O. Muthen posted on Tuesday, December 05, 2006 - 11:56 pm
I think you want to collapse time intervals so that you have some events in each.
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