Software tool for modelling mortality intensities and life table construction



  • to calculate numerous life tables in one step?
  • to smooth intensities of mortality?
  • to extrapolate probabilities till the highest ages?
  • to select among six mortality models?
  • to compare them in text and graphical outputs?



DeRaS (Death Rates Simulation) is a new software tool designed for an efficient life table construction under several detailed conditions defined by the user.


DeRaS is useful for all who need to quickly and efficiently construct one, two, ten or even up to hundreds of life tables for more populations and/or who want to use different methods of mortality data smoothing and extrapolating.


DeRaS offers several smoothing and extrapolating methods of empirical mortality rates or probabilities of dying at higher ages. There are six generally recognized mortality models included in the application – Gompertz and Gompertz-Makeham as two representatives of exponential functions, two logistic functions (Kannisto and Thatcher with constant) and two less frequently used models (Coale-Kisker, Heligman-Pollard).

Unknown parameters are estimated through a nonlinear regression procedure using iteratively reweighted least squares. Weights enable to eliminate heteroskedasticity in data.

All available data from the Human Mortality Database were employed for testing this application.


For a detailed information about DeRaS please see documentation or short PowerPoint presentation describing main features of the application.


 Purchase & Download Support Contact


Besides comprehensive, basic information it enables downloading a presentation demonstrating and describing DeRas main features and functions as well as product documentation, and allows ordering or directly purchasing the latest version of our product.

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Charles University in Prague, Faculty of Science, Prague, Czech Republic

© 2015 – Boris Burcin - Klára Hulíková Tesárková - David Kománek