Decomposition of variance

Dear users,
after the estimation (bayesian aproach) of my model, i need to compute the decomposition of variance of some variables.
Is it possible to have decomposition of variance with different horizons?
Cheers
after the estimation (bayesian aproach) of my model, i need to compute the decomposition of variance of some variables.
Is it possible to have decomposition of variance with different horizons?
Cheers