Hi John
Thanks a lot for the reply.
Could you suggest how I can correct this problem? I tried using a
correlation matrix instead of raw moments, but still got the same error. I
also fixed parameters v1,v2,v3,a1 at 1; then it gave me the error that the
system is exatly singular.
To answer the
Dear Sunil,
There are 7*8/2 = 28 raw moments among the 7 observed variables. Of these,
6*7/2 = 21 are used for the moments among the 6 fixed-exogenous variables,
leaving 28 - 21 = 7 df. You model has 11 free parameters. So df for the
model = 11 - 7 = -4.
Some additional comments:
If you're
