Department of Finance

 

Date of this Version

1994

Document Type

Article

Citation

Journal of Actuarial Practice 2 (1994), pp. 145-158

Comments

Copyright 1994 Absalom Press

Abstract

The problem considered is that of reconciling two rate level indications that are based on several common factors, but have been made at different review periods. A popular approach to this problem is the so-called sequential replacement method, which calculates the impact of each individual factor. Unfortunately, this method has a serious deficiency: the estimated impact of a factor depends upon the order of the replacement. To counteract this defect, a new approach, called the chain rule approach, is developed. Using this approach, an explicit formula is given for calculating the impact and the marginal impact of each factor.

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