Human life expectancy is defined as the average number of remaining years an individual of a precisely-defined population group can expect to live. It can be specified for any age, but the commonest age-specific form is life expectancy at birth. The calculation is typically based on mortality tables. On the basis of the age-specific mortality rates observed at a particular date, a calculation is made of the average number of years of life members of the various age groups would have yet to live, or be expected to live provided that mortality probabilities did not change.
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Baten, Jörg and
“Life expectancy”, in:
Encyclopedia of Early Modern History Online
, Editors of the English edition: Graeme Dunphy, Andrew Gow. Original German Edition: Enzyklopädie der Neuzeit. Im Auftrag des Kulturwissenschaftlichen Instituts (Essen) und in Verbindung mit den Fachherausgebern herausgegeben von Friedrich Jaeger. Copyright © J.B. Metzlersche Verlagsbuchhandlung und Carl Ernst Poeschel Verlag GmbH 2005–2012.
Consulted online on 22 November 2019 <http://dx.doi.org/10.1163/2352-0272_emho_SIM_023189>
First published online: 2015
First print edition: 20190801