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Fig. 5 | Genus

Fig. 5

From: A two-parameter hazard function to describe age patterns of mortality in ancient Northwestern Europe

Fig. 5

Fit of the Russell dataset; i.e., the incomplete 13th-century mortality pattern (n = 532). Notes: Age groups 0, 1–4, 5–9, 10–14, 15–19, …, 95+. Source data: Russell (1948: 180-1; 202), but corrected for the possibility that persons who entered an age group might have died in that same age group as well (Hollingsworth 1975: 156). Best fit to the two-parameter model for β = 0.064; θ = − 6.3; WRMSE = 0.20. Best fit to the Brass logit model with reference to Princeton Model West level 12 (chosen because it produces the smallest mean error for the HMD dataset and the EME dataset): a = − 0.87; b = 1.37; WRMSE = 0.41. Best fit to the Brass logit model with reference to Princeton Model West level 24 (chosen because it produces the smallest error for this particular mortality pattern): a = − 0.74; b = 0.72; WRMSE = 0.33

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