Some general Gompertz and Gompertz-Makeham life expectancy models

Abstract

Life expectancy models are highly important, as they indicate the populations health. The present models consider several types of factors, and by analyzing them we extend the formulae to new, mixed types in order to create particular representations that are beneficial for creating future results and estimations.

Keywords

• gompertz distribution
• makeham term
• life expectancy
• mortality
• gamma function
• gamma-heterogeneous populations
• frailty