Download e-book for kindle: Actuarial Modelling of Claim Counts: Risk Classification, by Michel Denuit, Xavier Marechal, Sandra Pitrebois,

By Michel Denuit, Xavier Marechal, Sandra Pitrebois, Jean-Francois Walhin

ISBN-10: 0470026774

ISBN-13: 9780470026779

There are a variety of variables for actuaries to contemplate whilst calculating a motorist’s coverage top rate, akin to age, gender and kind of car. additional to those elements, motorists’ premiums are topic to event ranking structures, together with credibility mechanisms and Bonus Malus structures (BMSs).

Actuarial Modelling of declare Counts provides a finished remedy of many of the event score platforms and their relationships with danger class. The authors summarize the latest advancements within the box, providing ratemaking structures, when taking into consideration exogenous information.

The text:

  • Offers the 1st self-contained, useful method of a priori and a posteriori ratemaking in motor insurance.
  • Discusses the problems of declare frequency and declare severity, multi-event platforms, and the mixtures of deductibles and BMSs.
  • Introduces fresh advancements in actuarial technological know-how and exploits the generalised linear version and generalised linear combined version to accomplish possibility classification.
  • Presents credibility mechanisms as refinements of industrial BMSs.
  • Provides sensible functions with genuine info units processed with SAS software.

Actuarial Modelling of declare Counts is vital interpreting for college kids in actuarial technology, in addition to working towards and educational actuaries. it's also ideal for pros focused on the coverage undefined, utilized mathematicians, quantitative economists, monetary engineers and statisticians.

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Extra resources for Actuarial Modelling of Claim Counts: Risk Classification, Credibility and Bonus-Malus Systems

Sample text

31) . This = exp − dF 0 showing that mixed Poisson distributions have an excess of zeros compared to Poisson distributions with the same mean. This is in line with empirical studies, where actuaries often observe more policyholders producing 0 claims than the number predicted by the Poisson model. The following result that has been proved by Shaked (1980) reinforces this straightforward conclusion. 2 Let N be mixed Poisson distributed with mean E N = . Then there exist two integers 0 ≤ k0 < k1 such that Pr N = k ≥ exp − Pr N = k ≤ exp − Pr N = k ≥ exp − k k!

Formally, two events A and B are said to be independent if the probability of their intersection equals the product of their respective probabilities, that is, if Pr A ∩ B = Pr A Pr B . This definition is extended to more than two events as follows. 1) i=1 The concept of independence is very important in assigning probabilities to events. 1). 6 Conditional Probability Independence is the exception rather than the rule. In any given experiment, it is often necessary to consider the probability of an event A when additional information about the outcome of the experiment has been obtained from the occurrence of some other event B.

When the hypotheses behind a Poisson process are verified, the number N 1 of claims hitting a policy during a period of length 1 is Poisson distributed with parameter . e. Pr N t + s − N s = k = exp − t tk k=0 1 2 k! Exposure-to-Risk The Poisson process setting is useful when one wants to analyse policyholders that have been observed during periods of unequal lengths. Assume that the claims occur according to a Poisson process with rate . If the policyholder is covered by the company for a period of length d then the number N of claims reported to the company has probability mass function Pr N = k = exp − d d k!

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Actuarial Modelling of Claim Counts: Risk Classification, Credibility and Bonus-Malus Systems by Michel Denuit, Xavier Marechal, Sandra Pitrebois, Jean-Francois Walhin


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