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Document Details : Title: On an Integral Equation for Discounted Compound Subtitle: Annuity Distributions Author(s): RAMSAY, Colin M. Journal: ASTIN Bulletin Volume: 19 Issue: 2 Date: November 1989 Pages: 191-198 DOI: 10.2143/AST.19.2.2014908 Abstract : We consider a risk generating claims for a period of N consecutive years (after which it expires), N being an integer valued random variable. Let Xk denote the total claims generated in the kth year, k ≥ 1. The Xk's are assumed to be independent and identically distributed random variables, and are paid at the end of the year. The aggregate discounted claims generated by the risk until it expires is defined as SN(υ) = ΣNk=1 υk Xk, where υ is the discount factor. An integral equation similar to that given by Panjer (1981) is developed for the pdf of SN(υ). This is accomplished by assuming that N belongs to a new class of discrete distributions called annuity distributions. The probabilities in in annuity distributions satisfy the following recursion: pn = pn-1(a+b/an), for n = 1,2, ..., where an is the present value of an n-year immediate annuity. |