Greetings,
I am trying to estimate State Space equations, but I encounter this message "WARNING: Singular covariance - coefficients are not unique" on state space output.
I have been trying to use alternative values for 'initial conditions'. I also tried re-specifying the equations. The entire code, including forecasts, it runs without errors, but I have a problem with the state space estimates. No standard errors (NA) and z-statistics (NA).
Any suggestions?
Kind Regards,
Nwabisa
WARNING: Singular covariance - coefficients are not unique
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