characteristics of the dynamic structure of white noise

[ps_ricky_son]

Hi

I am not so clear on this part. Should I summarized as below?

- for unconditional function
- when displacement is not zero, autocovariance = zero
- when displacement is not zero, autocorrleation/partial autocorrelation = zero
- when displacement is zero, autocorrleation/partial autocorrelation = one

- but what is autocovariance when displacement is zero?

- and the value of autocfovariance, autocorrelation and partial correlation in the case of conditional function

- also, should I say the main difference between conditional and unconditional function is whether the mean and covariance are constant? (i.e. conditional - not constant, unconditional - constant)

Thanks a lot.