Abstract
The costs of poor health conditions are difficult to estimate for the Middle Ages. It is possible to establish in a tentative way a normal distribution by age and sex and to define what additional damage pestilence and plague did. One possible index is the number of able bodied persons (assuming persons of a definite age to be able bodied) compared to children, a dependency index. A second index is of the relative number of persons dying before they completed their life as able bodied persons. A third, not related to age, might be the number of persons too poor to pay certain taxes before and after the plague. Such persons were presumably too poor in part because of age or ill health.

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