Long-range trends in adult mortality: Models and projection methods
In the study reported here, I had two objectives: (1) to test a new version of the logistic model for the pattern of change over time in age-specific adult mortality rates and (2) to develop a new method for projecting future trends in adult mortality. A test of the goodness of fit of the logistic model for the force of mortality indicated that its slope parameter is nearly constant over time. This finding suggests a variant of the model that is called the shifting logistic model. A new projection method, based on the shifting mortality model, is proposed and compared with the widely used Lee-Carter procedure.
Bongaarts, John. 2005. "Long-range trends in adult mortality: Models and projection methods," Demography 42(1): 23–49.
How Long Do We Live?