Experience rating and credibility

Abstract

Let me begin with some practical examples of experience rating. a) Swiss Automobile Tariff 1963 — Within each tariff-position there are 22 grades: — The new owner of a car starts at grade 9 — The basic premium is determined on the basis of objective characteristics of the risk and essentially depends on the horse-power classification of the car — The 22 grades are experience-rated as follows: For each accident one rises three grades and for each accident-free year one falls one grade. A driver who has I accident in every 4 years hence remains within four adjacent grades. b) Sliding Scale Premiums in Reinsurance Excess of Loss Contracts often stipulate that: The rate of premium to be applied to the subject premium volume is determined at the end of the cover period as follows: subject to a minimum of 0,04 and a maximum of 0,08 c) Participation in Mortality Profit in Group Life Insurance A group life insurance covers the members of the group on a one year term basis. It is often agreed that at the end of the year mortality profits are given back to the group according to the formula refund = x% gross premiums — y% claims (where x < y) All these examples fall under the heading “Experience Rating”. What do they have in common? Definition: A system by which the premium of the individual risk depends upon the claims experience of this same individual risk.

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