Compensation law of mortality
The compensation law of mortality states that the relative differences in death rates between different populations of the same biological species decrease with age, because the higher initial death rates in disadvantaged populations are compensated by lower pace of mortality increase with age. The age at which this imaginary convergence of mortality trajectories takes place is named the "species-specific life span". For human beings, this human species-specific life span is close to 95 years.
Compensation law of mortality is a paradoxical empirical observation, and it represents a challenge for methods of survival analysis based on proportionality assumption. The compensation law of mortality also represents a great challenge for many theories of aging and mortality, which usually fail to explain this phenomenon. On the other hand, the compensation law follows directly from reliability theory, when the compared systems have different initial levels of redundancy.
