Fig. 2

Life cycle. Partial life cycle graph for an age-classified life cycle with with four age classes and two causes of death; q i and s i are the probabilities of death due to causes 1 and 2, respectively, in age class i
Life cycle. Partial life cycle graph for an age-classified life cycle with with four age classes and two causes of death; q i and s i are the probabilities of death due to causes 1 and 2, respectively, in age class i