Hi,
I have been comparing simple models between Mx and OpenMx and I get the exact same results using the same data for an univariate ACE model but as soon as I add a definition variable, path coefficients and fit indices start to differ considerably. Can someone please tell me how or how to find out how the calculation of likelihood may or may not differ between the two programs?
I thought this may be partly due to differences in dealing with unmet assumptions, or calculation of definition variables? Or a model misspecification?
Jane