[R-sig-eco] Randomly Stopped Sum Model

[Mollie Brooks]

Hi George, 

I’m not familiar with the method in that paper, but I know that "a Tweedie distribution is equivalent to the distribution obtained by summing a Poisson number of gamma random variables" (Foster & Bravington 2013) and there are a few methods available in R for estimating the Tweedie distribution (i.e. compound Poisson–gamma distribution). 

…but is the measurement for each reproductive event really continuous, e.g something like total clutch weight or volume?

cheers,
Mollie
   


> On 11Oct 2018, at 15:49, Glen,George <george.glen using ufl.edu> wrote:
> 
> Hi all,
> 
> I found this paper online (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4226152), which discusses a method to model the sum of continuous random variables over a number of events where the number of events is also a random variable. I was wondering if anyone knew of specific examples using this approach to model reproductive events in animal populations? Or if a robust modeling framework in R has been constructed?
> 
> “What is best in mathematics deserves not merely to be learnt as a task, but to be assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.” Bertrand Russell
> 
> Graduate Assistant (PhD)
> Archie Carr Center for Sea Turtle Research
> Department of Biology
> University of Florida
> 
> Tel: (+1) 352-282-5616         Website: http://accstr.ufl.edu/
> Skype: geoglen12                  Email: george.glen using ufl.edu<mailto:george.glen using ufl.edu>
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> _______________________________________________
> R-sig-ecology mailing list
> R-sig-ecology using r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-ecology