ON PC SOLUTIONS OF PARMA MODELS
Abstract: This note is concerned with the existence of periodically correlated solutions for the
PARMA system
where
is a white noise and the varying coefficients
and
are periodic in
with
period
Conditions which ensure the existence of periodically correlated solutions for
such systems are obtained.
2000 AMS Mathematics Subject Classification: 62M10, 60G10.
Key words and phrases: ARMA models, PARMA models, periodically correlated.