Bayesian prediction of disability insurance frequencies using economic indicators

C. Donnelly and Mario V. Wüthrich

Annals of Actuarial Science, 2012, vol. 6, issue 2, 381-400

Abstract: We use economic indicators to improve the prediction of the number of incurred but not recorded disability insurance claims, assuming that there is a link between the number of claims and the chosen economic indicators. We propose a Bayesian model where we model the claims development in three directions: along incurred periods, recording lag periods and calendar periods. A stochastic model of the economic indicators is incorporated into the calendar period development direction. Thus we allow for the impact of the economic environment on the number of claims. Applying the proposed model to data, we illustrate how the inclusion of economic indicators affects the prediction of the number of incurred but not recorded disability claims.

Date: 2012
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