A Bidimensional Approach to Mortality Risk

We analyze the evolution over time of portfolios of life insurance contracts referring to different cohorts or risk classes of insureds. We model the intensity of mortality as a random field, in order to capture cross-generation (risk class) effects induced by the on-going management of portfolios of policies. Applications are described in the context of mortality risk analysis and (market) valuation of liabilities at aggregate level. It is shown how the model can be employed when an insurer's new business is considered.