Is life expectancy enough? Estimating age-specific mortality rates by considering the relationship between Siler model parameters and life expectancy at birth

Understanding mortality in detail, with respect to age, sex and country, is crucial for comprehending this complex phenomenon. Indirect estimation has emerged as a valid approach to derive analytical values from a synthetic index, allowing us to move beyond the narrow focus on life expectancy at birth that characterises many forecasting models. By exploiting the correlations between the parameters of the Siler model and life expectancy at birth, it becomes possible to reconstruct age-specific mortality rates across the entire lifespan, from age 0 to 100. Preliminary results indicate small estimation errors and a coherent, smooth and easily interpretable fit.