I am comparing longevity using as a proxy simulations of maximum conditional lifespan based on published matrix models. Most of the transitions that I’m using are based on annual population changes (from 1 year to the next year), however, some other transition matrices are based on variable time intervals (months, 2-year, 5-year, etc… How should I standardize these values to make them comparable? An easy way I have in mind would be just to divide the estimated lifespan by 12 in the case of monthly matrices or multiply by 2 when dealing with lifespan calculated based on biannual matrices, but I am not sure if that would be appropriated. Any suggestion?
I think that in the supplementary information of Jones et al. 2014 Nature, you may find the response. They have also R code for calculations of life expectancy.
Good luck!
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