The study and application of multiple life model based on the same monotonous

When research multiple life insurance problem in life insurance actuarial practice, often assuming that all the random variables of rest life are independent, so we can get the life function and the net single premium of multiple life. But in fact, because the each life in the multiple life model is always under some common factors, and between life there must be exist some kind of dependency, by reference[1] know with drab is one of the strongest dependency. This paper assumes that the multiple life under a common factor and the rest life is under the same monotonous, give the net single premium of the year regular life annuity of multiple life model.