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MIMIC model and non-unique solutions
Categorical Data Modeling
posted on Friday, March 02, 2012 - 11:45 am
I am attempting to fit a MIMIC model using the WLSMV estimator and obtain the following error message:
THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES COULD NOT BE
COMPUTED. THE MODEL MAY NOT BE IDENTIFIED. CHECK YOUR MODEL.
PROBLEM INVOLVING PARAMETER 9.
I have attempted to supply starting values for the parameter concerned and can obtain convergence. However I have noticed that supplying different starting values gives different solutions.
I have tried exploring random starts as I would with mixture modelling but get the following message:
*** WARNING in ANALYSIS command
The STARTS option is not available with TYPE=GENERAL and ESTIMATOR=WLSMV.
STARTS settings will be ignored.
Are there workarounds for this issue when fitting a MIMIC model ? Many thanks for any guidance you can offer.
Linda K. Muthen
posted on Friday, March 02, 2012 - 11:59 am
Please send the relevant files and your license number to
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