Abstract
Consider the well known Galton-Watson branching process (Harris (1963)) in which individuals reproduce independently of each other and have probabilityaj(j= 0, 1, · · ·) of giving rise tojindividuals in the next generation. In recent years some attention has been given to the branching process in which there is an independent immigration component at each generation,bj(j= 0, 1, · · ·) being the probability ofjimmigrants entering each generation. For a review of this work see Seneta (1969), and Pakes (1971 a, b and c) for further results.

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