On an Integral Equation for Discounted Compound-Annuity Distributions

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 deonte the total claims generated in the Kth year, k=1. The Xk's are assumed to be independent and identically distributed random variables, are paid at the end of the year. The aggregate discounted claims generated by the risk until it expires is defined as [see article for equation], where v is the discount factor. An integral equation similar to that given by Panger is developed for the pdf of Sn(v). This is accomplished by assuming that "N" belongs to a new class of discrete distributions called annuity distributions. The probabilities in annuity distributions satisfy the following recursion: [see article] where an is the present value of an n-year immediate annuity. Annuity distributions; integral equation; aggregate discounted claims.