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Siler’s five-parameter competing-risk mortality model has been applied to a world-wide sample of life tables, and to the Coale and Demeny model tables. This model incorporates three additive hazards that correspond to the three types of mortality described by Pearl and Miner in 1935. The results suggest that this model fits life tables more accurately than the four parameter Logit model of Ewbank et al., and provides parameter estimates that are sufficiently well determined to interpret biologically. We conclude that the model is useful for graduating abridged mortality tables and developing biological theories of mortality.