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Degrouping mortality data for the elderly


  • Anastasia Kostaki
  • Jan Lanke


Proposed in this paper is a technique for estimating, from coarsly grouped empirical death data, the age-specific numbers of deaths for the elderly population. This question is primarily of interest in countries where the empirical data are available only in a grouped form, given usually in quinquennial age groups and in a large open-ended interval for the ages 85 and over. The main reason that the official data are given in such a form in some countries of Southern Europe and in the Third World is the existence of heaping in the empirical data, i.e. misstatements in age recording, usually rounding to the nearest integer divisible with five. Our evaluation of the method on Swedish mortality data shows that the technique proposed can be efficiently applied to period mortality data.

Suggested Citation

  • Anastasia Kostaki & Jan Lanke, 2000. "Degrouping mortality data for the elderly," Mathematical Population Studies, Taylor & Francis Journals, vol. 7(4), pages 331-341.
  • Handle: RePEc:taf:mpopst:v:7:y:2000:i:4:p:331-341
    DOI: 10.1080/08898480009525465

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    Cited by:

    1. Anastasia Kostaki & Vagelis Panousis, 2001. "Expanding an abridged life table," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 5(1), pages 1-22, September.

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    Heaping; expansion techniques;


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