Demography

pp 1–1 | Cite as

Correction to: Perturbation Analysis of Indices of Lifespan Variability

Correction

Correction to: Demography (2013) 50:1615–1640

  https://doi.org/10.1007/s13524-013-0223-3

We discovered an error in Eq. (12) (p. 1621). The correct equation should read as follows:
$$ {\overline{e}}_y={e}_y+\frac{a_y}{n}\left({e}_{y+1}-{e}_y\right). $$

This equation was shown only for comparison, for readers who were familiar with life tables but not matrix notation. It was not used in any calculations or results and is not necessary to follow the article’s analysis.

We apologize for any confusion that this might have caused.

Copyright information

© Population Association of America 2018

Authors and Affiliations

  1. 1.Max Planck Institute for Demographic ResearchRostockGermany
  2. 2.University of AmsterdamAmsterdamthe Netherlands

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