State Space
Posted: Fri Feb 11, 2011 10:03 am
Hello. Thank you for all the help here, it has been really helpfull.
I am making a Kalman Filter model to get an unonbserved factor from two series (as Engle and Watson).
The thing is I have a doubt with the representation, for example:
KF.append @state FS_Unem = FS_Unem(-1) + [var=exp(c(1))]
KF.append @state FS_GDP = FS_GDP(-1) + [var=exp(c(2))]
KF.append @state FC = FC(-1) + [var=exp(c(3))]
KF.append @signal Unem = FC + FS_Des + [var = exp(c(4))]
KF.append @signal GDP = FC + FS_CtPIB + [var = exp(c(6))]
Here I have two signals for variables Unem and GDP, and the states for the specific factors of each series and a comon factor to them.
The thing is I don“t know some things about this:
-If with this set out Eviews will automatically set the initial conditions for the unknown factors (FS_Unem, FS_GDP and FC) to estimate them.
-Also I am not sure if I have to add the coefficients with the variables or if they will be given by default (for example, instead of writing FC=FC+FS_Des +[var = exp(c(6))] I need to put FC=c(6)*FC+c(7)*FS_Des +[var = exp(c(6))]).
Thanks a lot.
Regards.
I am making a Kalman Filter model to get an unonbserved factor from two series (as Engle and Watson).
The thing is I have a doubt with the representation, for example:
KF.append @state FS_Unem = FS_Unem(-1) + [var=exp(c(1))]
KF.append @state FS_GDP = FS_GDP(-1) + [var=exp(c(2))]
KF.append @state FC = FC(-1) + [var=exp(c(3))]
KF.append @signal Unem = FC + FS_Des + [var = exp(c(4))]
KF.append @signal GDP = FC + FS_CtPIB + [var = exp(c(6))]
Here I have two signals for variables Unem and GDP, and the states for the specific factors of each series and a comon factor to them.
The thing is I don“t know some things about this:
-If with this set out Eviews will automatically set the initial conditions for the unknown factors (FS_Unem, FS_GDP and FC) to estimate them.
-Also I am not sure if I have to add the coefficients with the variables or if they will be given by default (for example, instead of writing FC=FC+FS_Des +[var = exp(c(6))] I need to put FC=c(6)*FC+c(7)*FS_Des +[var = exp(c(6))]).
Thanks a lot.
Regards.