Drewnowski's index to measure lifespan variation : revisiting the Gini coefficient of the life table
Aburto, José Manuel (London School of Hygiene and Tropical Medicine)
Basellini, Ugofilippo (Max Planck Institute for Demographic Research)
Baudisch, Annette (University of Southern Denmark)
Villavicencio, Francisco (Centre d'Estudis Demogràfics)

Data:	2022
Resum:	The Gini coefficient of the life table is a concentration index that provides information on lifespan variation. Originally proposed by economists to measure income and wealth inequalities, it has been widely used in population studies to investigate variation in ages at death. We focus on the complement of the Gini coefficient, Drewnowski's index, which is a measure of equality. We study its mathematical properties and analyze how changes over time relate to changes in life expectancy. Further, we identify the threshold age below which mortality improvements are translated into decreasing lifespan variation and above which these improvements translate into increasing lifespan inequality. We illustrate our theoretical findings simulating scenarios of mortality improvement in the Gompertz model, and showing an example of application to Swedish life table data. Our experiments demonstrate how Drewnowski's index can serve as an indicator of the shape of mortality patterns. These properties, along with our analytical findings, support studying lifespan variation alongside life expectancy trends in multiple species.
Ajuts:	European Commission 2019/AdG-884328 European Commission 896821 Agencia Estatal de Investigación IJC2019-039144-I
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Concentration index ; Gompertz; Life expectancy ; Lifespan inequality ; Mortality ; Threshold age
Publicat a:	Theoretical population biology, Vol. 148 (2022) , p. 1-10, ISSN 0040-5809

DOI: 10.1016/j.tpb.2022.08.003

11 p, 1.1 MB

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