the nth year). I. Introduction Modern life is characterized by risks of different kind: some threatening all persons and some restricted to the owners of property, motor ears, etc., while still others are typical for some The collective point of view in risk theory considers only the arrival time 2 Risk processes Stochastic processes De nitionStochastic process (or random process) is a family of random variables fX(t): t2 Tg, where tis time parameter and T is handbook offers an overview of diff