Explaining mortality rate plateaus
|Title||Explaining mortality rate plateaus|
|Publication Type||Journal Article|
|Year of Publication||2001|
|Authors||Weitz JS, Fraser HB|
|Journal||Proceedings of the National Academy of Sciences of the United States of America|
|Date Published||DEC 18|
We propose a stochastic model of aging to explain deviations from exponential growth in mortality rates commonly observed in empirical studies. Mortality rate plateaus are explained as a generic consequence of considering death in terms of first passage times for processes undergoing a random walk with drift. Simulations of populations with age-dependent distributions of viabilities agree with a wide array of experimental results. The influence of cohort size is well accounted for by the stochastic nature of the model.