WARNING: Singular covariance - coefficients are not unique
Posted: Fri Sep 02, 2022 4:42 am
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
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