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A statistical inference for random coefficient first-order autoregressivemodel $[RCAR(1)]$ was investigated by P.M. ROBINSON (1978) in which thecoefficients varying over individuals. In this paper we attempt to generalizethis result to random coefficient autoregressive model of order $p$$[RCAR(p)]$. The stationarity condition will derived for this model.

Some Probabilistic and Statistical Properties of a Random Coefficient Autoregressive Model